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Simrad AP25 Manual

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MANUAL
SIMRAD AP25
Autopilot
20221495F
Sw.1.3
English

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Summary of Contents for Simrad AP25

  • Page 1 MANUAL SIMRAD AP25 Autopilot 20221495F Sw.1.3 English...

  • Page 3: Instruction Manual

    AP25 autopilot. Great care has been paid to simplify operation and set-up of the Simrad AP25, however, an autopilot is a complex electronic system. It is affected by sea conditions, speed of the vessel, hull shape and size.
  • Page 4 Simrad AP25 Autopilot Document history Rev. A First edition. Rev. B Minor corrections in text. Table with SimNet/NMEA2000 messages included. Rev. C FU50 substituted by FU25. Part no. for AC40 Power PCB ass’y, page 136 corrected. Added notes in chapter 3.19. Minor corrections in text and display pictures.

  • Page 5: Table Of Contents

    1.7 Heading Sensors.................. 12 RC36 Rate compass ................12 RFC35 Electronic Fluxgate Compass (optional) ........ 12 NMEA compass (optional) ..............12 Simrad gyrocompasses................ 12 1.8 Optional equipment................13 R3000X Remote Control ..............13 JS10 Joystick..................13 FU25 Follow-Up Steering Lever ............13 TI25 Thruster Interface ...............
  • Page 6 Simrad AP25 Autopilot Heading capture .................. 21 2.9 Automatic control of steering parameters........... 22 Power boat................... 22 Sailboat....................23 2.10 Manual Selection of HI/LO Parameters..........23 2.11 PATTERN steering ................24 U-turn ....................24 C-turn ....................25 Spiral-turn ................... 26 Zigzag-turns ..................
  • Page 7 Instruction manual AUTO Mode ..................56 NAV Mode..................58 WIND Mode ..................58 2.25 Quick Setup..................59 VMG optimizing (RACING).............. 59 Layline steering (RACING)..............60 2.26 INFO menu ..................60 Course knob icon ................62 INFO menu flowchart ................. 62 INFO menu and Main Screen, active unit ..........
  • Page 8 Simrad AP25 Autopilot 3.16 JS10 Joystick..................82 3.17 S35 NFU Lever installation ..............82 3.18 Interfacing ................... 83 3.19 SimNet....................83 SimNet network cables ............... 84 SimNet power and termination ............84 3.20 Single NMEA input/output ..............89 3.21 Double NMEA input/output ............... 89 3.22 NMEA output on Port 2..............
  • Page 9 Instruction manual 4.6 Display units ..................113 4.7 Sea Trial .................... 114 Set Rudder zero................. 115 Minimum rudder ................115 Compass calibration................116 Compass Offset ................. 118 Set Thrust Direction ................119 Wind Offset..................120 Wind damping................... 120 Depth Offset..................121 Automatic tuning................
  • Page 10 Simrad AP25 Autopilot Autopilot Control Unit..............137 Trouble shooting ..................139 6.1 Alarms ....................139 Spare Parts List..................144 Technical Specifications ................147 8.1 AP25 Autopilot System ..............147 8.2 AP25 Control Unit ................149 8.3 Autopilot Computers................. 150 8.4 RC36 Rate compass ................152 8.5 RFC35 Fluxgate compass ..............

  • Page 11: System Description

    Simrad manufactures a complete range of autopilots for all types of vessels, from recreational boats to merchant marine vessels.

  • Page 12: System Components

    Simrad AP25 Autopilot Other documentation material that is provided with your system includes a warranty card. This must be filled out by the authorized dealer that performed the installation and mailed in to activate the warranty. System components A basic AP25 system consists of the following units (refer to Figure 1-1): •...

  • Page 13: Ap25 Control Unit

    It has two Robnet2 connectors for system interconnection and expansion and two SimNet connectors for control and data sharing with other Simrad products. A NMEA2000 Adaptor Cable is available for interface through a SimNet port (page 146). Autopilot Computer The autopilot computer is the heart in the AP25 autopilot system.

  • Page 14: Heading Sensors

    RFC35 Electronic Fluxgate Compass (optional) A compact heading sensor from Simrad with 15 m (45 feet) of cable. The direction of the earth's magnetic field is sensed by a floating ring core in a fluxgate coil and transformed to a digital signal read by the autopilot steering computer.

  • Page 15: Optional Equipment

    System description Optional equipment A series of optional equipment are available for the basic AP25 system. R3000X Remote Control A small handheld remote control with two push buttons for power steering or course selection (port and starboard), and one push button with built-in lighted indicator for limited mode change.

  • Page 16: Multiple Stations

    Simrad AP25 Autopilot Multiple stations Multiple control units can be added to the system. See comparison chart on page 11. Software record When the system is switched on, a status display shows the software versions for the control unit and the autopilot computer.

  • Page 17: Operation

    Operation 2 OPERATION WARNING ! An autopilot is a very useful navigational aid, but DOES NOT under any circumstance replace a human navigator. Do not use automatic steering when: • In heavy traffic areas or in narrow waters • In poor visibility or extreme sea conditions •...

  • Page 18: On/Off - Standby Mode

    Simrad AP25 Autopilot The control unit shown above can operate as a stand alone unit in an autopilot system or combined in a multistation system. In a multistation system the command can easily be transferred from one unit to another. Units not in control will display "Inactive"...

  • Page 19: Flashing Course Knob Icon

    Operation After approximately 5 seconds, the system is operative and the unit that was turned on will show the Standby mode display. Other units in a multistation system will display "Inactive". Control is transferred to any single unit by pressing its’ STBY button.

  • Page 20: Ap25 With Msd50 Stern Drive Unit

    The information in section 2.3 only applies if your autopilot is Note ! driving a Simrad MSD50 Stern Drive. The MSD50 Stern drive unit has a relative feedback signal which needs a zero point setting after the autopilot has been turned on.

  • Page 21: Follow-Up Steering (Fu)

    Operation Follow-Up steering (FU) Not applicable for Virtual feedback configuration (page 67). Note ! In the Follow-Up steering mode the course knob may be used to set rudder commands. The commanded rudder angle is shown on the display and the rudder will move to the commanded angle and stop.

  • Page 22: R3000X Remote Control (Nfu)

    Simrad AP25 Autopilot R3000X Remote Control (NFU) In STANDBY mode, the rudder will SIMRAD move as long as the Port or Stbd Push button for button is pressed. Port and Stbd In AUTO mode and Wind modes the commands set course or set wind angle will change 1°...

  • Page 23: Automatic Steering

    Operation Automatic Steering When AUTO mode is selected, the AP25 automatically picks the current boat heading as the set course and maintains the simultaneous rudder angle. This gives a bumpless transfer at the mode change. Automatic steering mode Set course: 340 degrees Compass reading: 340°M Heading source: Rate compass Rudder angle: 00°...

  • Page 24: Automatic Control Of Steering Parameters

    Simrad AP25 Autopilot Automatic steering mode New “captured” heading: 305 degrees Compass reading: 301° M (Magnetic) or T (True) Heading source: Rate compass Rudder angle: 01° to stbd. Speed: 8.1 kt water speed from the log Steering parameter: LO-A Regain manual steering by pressing the STBY button 2.9 Automatic control of steering parameters...

  • Page 25: Sailboat

    Operation Speed Transition to LO parameters with increasing speed: 10 Knots Transition Speed set to 9 Knots Transition to HI parameters with decreasing speed: 8 Knots Sailboat When sailing in WIND mode, the parameters are automatically changed by the direction of the wind as per below or by the boat speed.

  • Page 26: Pattern Steering

    Simrad AP25 Autopilot Quick double press Notes ! 1. If you are in NAV or WIND modes you need not enter AUTO mode to manually change the parameter set. Just make a quick double press on the AUTO button. 2. The manually selected setting (HI or LO) will override the automatic selection and remain in effect until you re-enter any automatic mode from STBY.

  • Page 27: C-Turn

    Operation C-turn The AP25 provides a continuous turn feature when in AUTO mode. This may be used for circling fish or a particular object on the seabed. C-turn makes the boat turn in a circle with a constant rate of turn. The user decides whether the C-turn should be made to Port or to Starboard.

  • Page 28: Spiral-Turn

    Simrad AP25 Autopilot Spiral-turn The spiral turn feature may also be used for circling fish or when searching a particular object on the seabed. Spiral-turn makes the boat turn in a spiral with a decreasing or increasing rate of turn. The user decides whether the spiral-turn should be made to Port or Starboard.

  • Page 29: Zigzag-Turns

    Operation Zigzag-turns A zigzag turn pattern is also available when in AUTO mode. The user decides whether the first turn should be made to Port or Starboard. Ensure that the zigzag-turn pattern has been selected under the User Set-up 2 menu. Refer to Turn Pattern select on page 55. To enter zigzag turn mode: Press of the TURN/DODGE button repeatedly until ZIGZAG is flashing in the display.

  • Page 30: Square-Turn

    Simrad AP25 Autopilot Square-turn The square turn feature in AUTO mode can also be made a rectangle or any pattern when the next turn is 90°. The user decides whether the first turn should be to Port or Starboard. Ensure that the Square-turn pattern has been selected under the User Set-up 2 menu.

  • Page 31: Lazy S-Turn

    Operation Lazy S-turn The AP25 also provides a lazy S-turn feature when in AUTO mode. The user decides whether the initial turn should be made to Port or to Starboard. Ensure that the lazy S-turn pattern has been selected under the User Set-up 2 menu.

  • Page 32: Depth Contour

    Simrad AP25 Autopilot Depth Contour Steering to a depth contour is also an AUTO mode feature. With input from an echo sounder, the autopilot can be set to steer the boat to a set depth. This is very useful if you want to follow a depth contour.
  • Page 33 Operation Select depth slope with the course knob. “/” means shallow is to starboard, “\” means shallow to port. Steer the boat to the depth you want to track and in the direction of the depth contour (main course). When the wanted depth is shown in the display, activate the depth contour steering with PORT or STBD button (any of the two).

  • Page 34: Dodge In Auto

    Simrad AP25 Autopilot course. Each time the boat crosses the reference depth the sign (+/-) of the CCA is changed and makes the boat turn to cross the reference depth contour in the opposite direction. The larger the CCA the bigger the turn.

  • Page 35: Thruster Steering (Optional)

    Operation Perform dodging in one of the following ways: 1. Manually steer the boat by the wheel: 2. Non Follow Up steering or using NFU by pressing: steering lever 3. Follow Up steering by and using the pressing both: course knob To return from Dodge mode, press one of the following: Selects AUTO Selects AUTO mode...
  • Page 36 Simrad AP25 Autopilot STANDBY Non-Follow Up steering mode Heading to be Heading to be maintained by rudder maintained by rudder and thruster AUTO mode Heading maintained by Heading maintained rudder by rudder and thruster When operating an On/Off thruster be aware that most electrical Note ! thrusters have a built in thermal cut-off switch.

  • Page 37: Tacking In Auto Mode

    Operation 2.14 Tacking in Auto mode The tack function is only available in sailboats when the system is set up for SAIL boat type in the installation setup. Tacking in AUTO mode is different from tacking in WIND mode. In AUTO mode the tack angle is fixed and can be set in the Installation/Dockside menu.

  • Page 38: Dodge In Nodrift Mode

    Simrad AP25 Autopilot Select NoDrift in the Setup menu when in STANDBY or AUTO mode. Press the NAV WIND button to enter NoDrift mode. The NAV WIND key is now programmed to always activate the NoDrift mode. If you want the key to activate NAV mode, enter the User Setup menu and select NAV.

  • Page 39: Navigating With The Ap25

    Operation 2.16 Navigating with the AP25 The source when operating in NAV mode is the Navigation (Nav) Note ! source. The AP25 has the capability to use steering information from an external navigator (GPS, Chart Plotter) to direct the boat to a specific waypoint location, or through a route of waypoints.
  • Page 40 Simrad AP25 Autopilot The prompt display shows the name or number of the next waypoint (WP), the bearing of the track line (BWW) from the previous waypoint to the destination waypoint, the required course change (CHG) and the direction in which the boat will turn.

  • Page 41: Setting The Waypoint Arrival Circle

    Operation If the required course change is more than the NAV change limit Note ! ° (default 10 ), you have to verify that the upcoming course change is acceptable. This is a safety feature. See page 124 on how to change the ‘NAV change limit’. Alert screen.

  • Page 42: Dodge In Nav

    Simrad AP25 Autopilot Example: With the speed of 20 knots you should use a waypoint circle with radius 0.09 nm. The distance between any waypoints in a route must not be Note ! smaller than the radius of the waypoint arrival circle when using automatic waypoint shift.

  • Page 43: Selecting A Different Navigation Source

    Operation To return from Dodge mode, press one of the following: Returns to NAV mode at present position with a new NAV prompt. Keeps all offset estimates (Wind/current etc.) in the algorithms (recommended). Selects NAV mode at present position with a new NAV prompt.
  • Page 44 Simrad AP25 Autopilot The display will show the set wind angle. Adjustments to this set angle can be made by using the course knob or PORT or STBD button. The display also presents heading and rudder angle. Wind (vane) mode Set wind angle: 044 degrees from stbd.

  • Page 45: Tacking And Gybing In Wind Mode

    Operation 2.20 Tacking and gybing in Wind mode In WIND mode there is a tacking and gybing aid function. Tacking in WIND mode as compared to AUTO mode can be performed when sailing with apparent or true wind as the reference, and with a true wind angle of less than 90 degrees.

  • Page 46: Tack And Gybe Operations

    Simrad AP25 Autopilot Tack and gybe operations Gybing is possible when the true wind angle is larger than 120°. When a gybe is initiated, the wind angle will first be set to 170°T on the same side as the current wind angle. The main sail should now be hauled.

  • Page 47: Wind Steering And Navigation

    Operation the wind side is shifted and an unwanted gybe may happen. This can be hazardous for both the crew and the mast. The gybe prevent function will be activated when the measured apparent wind angle becomes greater than 175° or when the wind angle gets opposite to the set wind angle.
  • Page 48 Simrad AP25 Autopilot [2] [4] [3] [7] Figure 2-2 Wind steering 20221495F...

  • Page 49: Operating In Wind Nav Mode

    Operation Operating in WIND mode Refer to Figure 2-2 with references [ ] the associated displays and the criteria (bullets) below. • The set wind angle should be larger than the ‘Minimum wind angle’ set in the Installation/Dockside menu and smaller than 170°...

  • Page 50: Multiple Station System

    Simrad AP25 Autopilot 2.22 Multiple station system In normal operation control is accessible from every control unit connected to the AP25 system. One control unit is "active" and provides the user with access to all functions. All remaining control units are "inactive" and have no effect on mode changes or course selection.
  • Page 51 Operation The “Lock function is disengaged by one of the following actions: • The active control unit unlocks the other ones and makes them “inactive” by another double press on the STBY button. It also displays the icon before it returns to the normal active state.

  • Page 52: User Set-Up Menu

    Adjustment is local to the control unit you adjust or synchronized with other units in the Simrad Group (page 131). NAV source Select the source for NAV mode steering e.g. CP34.
  • Page 53 Operation NAV WIND This setup will configure the active mode under the NAV WIND button. The following alternatives are available: • NAV (Ref page 37) • NoDrift (Ref. page 35) • WIND Auto Wind steering will be disabled when ‘NAV’ or ‘NoDrift’ is selected.
  • Page 54 Simrad AP25 Autopilot The ‘Nav/Wind’ parameter can be set in the User Setup or in the Quick setup. Quick setup is activated after by quick double press on the NAV WIND button. ‘WIND Apparent’ is selected when you only want to steer to apparent wind.
  • Page 55 – – indicates that no source supplying the data is available. Notes ! 1. Simrad products will be identified by the product name provided the data is available on SimNet. If data is provided via an NMEA0183 port on the autopilot computer, the display will read NMEA-1 or NMEA-2.
  • Page 56 Select the source for Apparent wind. Wind Calculated Select the source for Calculated Wind data for the Simrad group. The autopilot uses internal source irrespective of the selected source. Water Speed Select the source for water speed (normally the same as the source providing Log data).
  • Page 57 Operation Course Adjust When using the (PORT) or (STBD) buttons in AUTO mode, you are changing the set course in 1° increments. If you prefer the increments to be 10° each press (does not apply for sailboats), proceed as follows: Select Course adjust and turn the course knob to change the setting.

  • Page 58: Auto Mode

    Simrad AP25 Autopilot AUTO Mode Settings that are added for the AUTO and WIND modes are shown below. Other relevant settings are described under STANDBY mode in this chapter. Response The Autotune function in the AP25 is so refined that 80-85 % of the boats will need no further adjustments of the steering parameters.
  • Page 59 Operation Thruster sens (only available if a thruster is connected). The Thruster sensitivity determines how many degrees the vessel will deviate from the set course before a thruster command is given. As the vessel deviates from its heading, the thruster will push the vessel back on.

  • Page 60: Nav Mode

    Simrad AP25 Autopilot NAV Mode The User setup for NAV mode is similar to the User setup for AUTO mode. It does not include the Nav/Wind and the Source select items. The User setup 2 contains the Set shallow water alarm and the Contrast setting.

  • Page 61: Quick Setup

    Operation WIND Auto This line will only appear if the autopilot has been set up for racing in the installation menu (page 106). See page 51 for information about the RACING parameters. User setup2 The User setup 2 contains the Set shallow water alarm and the Contrast setting.

  • Page 62: Layline Steering (Racing)

    Simrad AP25 Autopilot Layline steering (RACING) ‘Layline steering’ can only be enabled or disabled when ‘Wind setup’ is set to ‘RACING’. It is enabled in the ‘NORMAL’ sub- mode. Layline steering is useful when navigating. It will use the Cross Track Error (XTE) from the navigator to keep the boat on the track line.
  • Page 63 Operation Step or scroll through the available instrument screens by pressing the PORT or STBD button or using the course knob. The right hand side of the display will show the following instrument screens: If you prefer not to have all the instrument pages available in the INFO menu, you may remove pages under the User setup 2 menu.

  • Page 64: Course Knob Icon

    Simrad AP25 Autopilot Course knob icon Initially when the INFO menu is accessed an icon will replace the mode index to tell that no course changes or other course related settings can be made unless you press a mode key. The icon will time out after 3-5 seconds and be replaced by the mode index.

  • Page 65: Info Menu And Main Screen, Active Unit

    Operation INFO menu and Main Screen, active unit INFO-menu Main screen 3-5 sec. time out INFO menu and Main Screen, inactive or locked unit Previous INFO page Next INFO page Last shown INFO page 20221495F...
  • Page 66 Simrad AP25 Autopilot This page is intentionally left blank 20221495F...

  • Page 67: Installation

    Installation 3 INSTALLATION General This section provides detailed information required to successfully installing AP25 Autopilot system. The AP25 system includes several modules that need to be mounted in different locations on the boat, and also need to interface with at least three different systems on the boat: •...

  • Page 68: Unpacking And Handling

    Simrad AP25 Autopilot b) Compass calibration c) Compass Offset adjustment d) Automatic tuning e) Viewing parameters 9. Test Autopilot Operation at Sea (refer to Sea Trial instructions, pages 114, 132) 10. Provide the user with training (Page 133) Unpacking and handling Care should be taken when unpacking and handling the equipment.

  • Page 69: Ap25 System Layout

    (page 109). The Virtual Feedback can be used on boats up to 40 ft. 2. In order to benefit from the virtual feedback technology your autopilot system must be using a Simrad rate compass for heading information. AP25 System Layout...
  • Page 70 Simrad AP25 Autopilot transmission link. The slots enable maximum flexibility to provide the 1:1 mechanical linkage relationship. Do not try to remove the transmitter arm from the feedback unit. Note ! The unit is factory adjusted and need no further adjustment at installation than described below.

  • Page 71: Autopilot Computer Installation

    Installation Due to space limitations, it may be necessary to cut the length of Note ! the transmitter rod to move the RF300 closer to the rudder post. Tighten the mounting screws for both the RF300 feedback unit and the transmitter rod ball joint. Observe the RF300 while someone turns the helm wheel through the complete travel from full port to full stbd.

  • Page 72: Cable Connections

    Simrad AP25 Autopilot Cable connections Use only shielded cables. This includes Mains input, drive units and if necessary for the extension of the RF300 Rudder Feedback cable. The clutch/bypass cable and the solenoid cable should be 1,5 mm (AWG14). Signal cables should be 0.5 mm (AWG20) twisted pairs.
  • Page 73 Installation Note! Ground terminal The Mains input is not polarity protected on AC40. Power Board terminals TB8, TB9 and TB10 are not on the AC10 Power Board Main Board terminals 20221495F...

  • Page 74: Drive Unit Installation

    Simrad AP25 Autopilot 3.10 Drive unit installation The relations between drive units, drive unit voltage, autopilot computer, drive performance and interface to the steering gear are shown in the tables below. Refer to the connecting diagram for the different drive units on page 74 onwards.
  • Page 75 Installation LINEAR DRIVE UNITS PWR. TILLER MODEL MOTOR AUTO- PEAK HARD- VOLTS PILOT STROKE THRUST RUDDER OVER CON- COM- mm (in.) kg (lb.) TORQUE TIME SUMP. PUTER sec. (in.) (lb.in.) (30% load) MLD200 AC10 300 (11,8) 1,5-6 A (440) (4350) (10,4) HLD350 AC10...

  • Page 76: Connecting A Reversible Pump

    Simrad AP25 Autopilot PREVIOUS MODELS DRIVE OF UNITS Model Autopilot Drive unit Input Drive output Interface to computer voltage voltage steering (Mains) gear RPU100 (1,0l) AC20 12,24,32V Proportional Hydraulic RPU150 (1,5l) AC20 rate plumbing RPU200 (2,0l) AC20 (Reversible hydraulic pump)

  • Page 77: Connecting A Hydraulic Linear Drive

    Installation Connecting a hydraulic linear drive HYDRAULIC AUTOPILOT COMPUTER LINEAR DRIVE POWER PCB TB1 TB2 TB3 TB4 TB5 Drive Engage Single pole clutch/bypass switch Figure 3-6 Connecting a hydraulic linear drive Connecting a solenoid valve AUTOPILOT COMPUTER SOLENOID POWER PCB VALVE TB1 TB2 TB3 TB4 TB5 Sol.

  • Page 78: Control Unit Installation

    Alternative panel mounting This way of mounting may be simpler, but will lift the unit from the panel surface. When installed adjacent to Simrad equipment there will be a 5,5 mm (0,22”) difference in height between the autopilot and the other equipment.

  • Page 79: Optional Bracket Mounting

    Installation Optional bracket mounting • Locate the cradle on the mounting site and mark the 4 holes for the fixing screws on the mounting surface. • Drill the 4 mounting holes and screw the cradle to the mounting surface. • Use the supplied screws to fasten the control unit to the left and right brackets.
  • Page 80 Simrad AP25 Autopilot both ends are available in 1, 5 and 10 m length. For cable extension a Robnet2 T-Joiner is required. When installing a system, try to minimize total Robnet2 cable length by connecting all Robnet2 units to the nearest available Robnet2 connector.

  • Page 81: Ap27 Connection

    J1 and J2 (top) are Robnet2 connectors. J3 and J4 are SimNet connectors. AP27 connection If a Simrad AP27 is part of the system, use the JP27 Jack Point and connect as shown on Figure 3-9. Alternatively cut the connector from the cable and connect the wires in parallel with the cable shown on Figure 3-11 using the same color code.
  • Page 82 Simrad AP25 Autopilot mounting location. As the heading is displayed on the AP25 Control Unit, the heading sensor can be mounted at a remote location. The RC36 rate compass also contains a magnetic heading sensor, so particular attention must be paid to the location. It can be mounted on deck or bulkhead, athwartship or alongship and has a 15 m (99’) cable with a Robnet2 connector.

  • Page 83: Rfc35 Fluxgate Compass Installation

    Installation RATE COMPASS AP16, AP25, AP26 Figure 3-13 RC36 connection to autopilot control unit Plug the RC36 into a Robnet2 connector (see Figure 3-9) or cut the connector from the cable and connect the wires in parallel with the cable shown in Figure 3-11. 3.14 RFC35 Fluxgate Compass installation (Optional back-up compass) The RFC35 Fluxgate Compass is a magnetic sensor, which...

  • Page 84: R3000X Remote Control Installation

    Simrad AP25 Autopilot 3.15 R3000X Remote Control installation R3000X should be mounted in the supplied bracket that can be fixed by four mounting screws. The unit is weather proof and can be mounted outdoor. R3000X AUTOPILOT COMPUTER REMOTE CONTROL POWER PCB...

  • Page 85: Interfacing

    24005729. 4. The AC10 has a single NMEA0183 input/output port. 5. The AC20 and AC40 have two NMEA0183 input/output ports and Clock Data interface to Simrad and Furuno radars. The NMEA0183 output may also drive Simrad IS15 instruments directly.

  • Page 86: Simnet Network Cables

    Simrad AP25 Autopilot SimNet network cables A SimNet unit has one or two yellow SimNet connectors. There are no dedicated “in” or “out” connectors. Find the shortest and easiest way to route the SimNet cables from product to product and select the standard length cables from the SimNet accessory program.
  • Page 87 Installation DATA COM BI COM BI SIM RAD IS12 SIM RAD IS12 SIMRAD IS12 STBY AUTO PW R INFO ALARM UPPER L OWER ALARM UPPER LOWER LIGHT PAGE UPPER LOWER LIGHT LIGHT TURN TIMER INFO INFO TIM ER INFO INFO...
  • Page 88 Simrad AP25 Autopilot COM BI COM BI COM BI DATA SIM RA D IS1 2 SIM RAD IS12 SIM RA D IS1 2 SIM RAD IS12 ALARM UPPER LOWER ALARM UPPER LOWER ALARM UPPER LOWER UPPER LOWER LIGHT LIGHT LIGHT...
  • Page 89 Installation DATA COM BI COM BI STBY SIM RAD IS12 SIM RAD IS12 SIM RAD IS12 AUTO INFO ALARM UPPER LOWER ALARM UPPER LOWER UPPER LOWER LIGHT LIGHT LIGHT PAGE TURN TIM ER INFO INFO TIM ER INFO INFO INFO INFO WIND SETUP...
  • Page 90 Simrad AP25 Autopilot Figure 3-21 Robnet2, SimNet and Roblink network Notes ! 1. Maximum total length of SimNet cable is 60 m (196 ft.) excluding the 30 m (99 ft.) of masthead cable. 2. It is not necessary to connect all autopilot control units to SimNet for data sharing.

  • Page 91: Single Nmea Input/Output

    Installation 3.20 Single NMEA input/output NAV RECEIVER AUTOPILOT COMPUTER OR PLOTTER MAIN PCB (NMEA talker) TB13 TB14 NMEA listener NMEA NMEA Output1 Input 1 Note IS15 RUDDER IS15 COMPASS RADAR Figure 3-22 Single NMEA connection If an IS15 Instrument is powered from TB14 Vbat+ and Gnd, Caution ! please observe that Vbat output voltage will follow mains supply voltage.

  • Page 92: Nmea Output On Port 2

    Simrad AP25 Autopilot 3.22 NMEA output on Port 2 Output signal Output terminal Output sentence Continuous output of compass Autopilot Computer Power HDT (True) or HDG (Magn.) heading at 10 Hz (10x/sec.) PCB. depending on heading source. Rudder angle output at 5 Hz NMEA2, TX2+, TX2–.

  • Page 93: Radar Clock/Data

    Installation 3.24 Radar Clock/Data SIMRAD/ AC20/AC40 AUTOPILOT COMPUTER ANRITSU P O W E R P C B FURUNO T B 8 T B 1 0 T B 9 RADAR R a d a r Figure 3-25 Radar Clock/Data connection 3.25 IS15 Instrument installation For installation and operation of the IS15 instruments refer to separate manuals.
  • Page 94 Simrad AP25 Autopilot If IS15 Expander is used in the instrument system, the NMEA connections are made to this unit. See Figure 3-27. Figure 3-26 IS15 Instruments / Autopilot computer connection Figure 3-27 IS15 Expander / Autopilot computer connection 20221495F...

  • Page 95: External Alarm

    Installation 3.26 External Alarm The external alarm circuit has an open collector output for an external alarm relay or buzzer (not on AC10). The operating voltage for the circuit is the main supply voltage. Max. load on external alarm output is 0.9 Amp. AUTOPILOT COMPUTER POWER PCB Ext.

  • Page 96: Electrical Connection

    Simrad AP25 Autopilot two washers and the cap nut provided. Adjust the location of the LF3000 Linear Feedback to allow full travel of the hydraulic cylinder without causing the retainer plate to hit the end of the cylinder. Check that the outboard motor can be tilted freely.

  • Page 97: Configuration And Setup

    Configuration and setup 4 CONFIGURATION AND SETUP First time turn on Before attempting to turn on the AP25 and perform an Installation Setup, the hardware installation and electrical connections must be completed in accordance with the installation instructions. The design of the AP25 includes advanced features that have simplified the installation and setup of an autopilot.

  • Page 98: Description Of Installation Settings

    Simrad AP25 Autopilot The display will read ‘SETUP REQUIRED’. Continue with the installation setup according to the next chapters. If you already have completed the installation settings, the autopilot will enter STBY mode. Description of Installation Settings The installation settings must be performed as part of the Note ! installation of the AP25 system.

  • Page 99: Installation Menu

    Configuration and setup Some important points regarding the installation settings: • When the AP25 is delivered new from the factory AND ANY TIME AFTER A MASTER RESET OF MEMORIES HAS BEEN PERFORMED, the installation settings are all reset to factory preset (default) values. The automatic interface prompt will appear (see page 95) and a complete setup has to be made.

  • Page 100: Language Selection

    Simrad AP25 Autopilot • Change the selected item by rotating the course knob in either direction. • Exit the Installation Menu by pressing STBY, AUTO, or NAV/WIND buttons. When using the Installation Menu, refer to the diagram "Installation settings Menu Flow Chart" on next page.
  • Page 101 Configuration and setup ENTER INSTALLATION MENU INSTALLATION SYMBOLS BY PRESSING AND HOLDING THE MENU SETUP BUTTON FOR 5 SECONDS SELECT OR CONFIRM BY COURSE KNOB LANGUAGE MENU PROCEED TO NEXT MENU ITEM LANGUAGE ENGLISH BY PRESSING STBD BUTTON DEUTSCH FRANCAIS REVERT TO PREVIOUS ESPANOL MENU ITEM...

  • Page 102: Dockside Settings

    Simrad AP25 Autopilot Dockside settings If the autopilot has no rudder feedback unit installed (configured Note ! for Virtual feedback), refer to the Dockside settings on page 109- 112. The following menu items are accessible and can be set up in the Dockside Menu: •...

  • Page 103: Drive Unit Voltage

    Configuration and setup Drive unit voltage Set the drive unit voltage to correct level. The selections are 12V, 24V, or 32V and should be set to the voltage specified for your drive unit. Refer to the drive unit table on page 72 for information. The drive engage/bypass clutch output follows the same voltage as set for the drive unit.
  • Page 104 Simrad AP25 Autopilot Confirm Rudder feedback calibration to STBD by turning the course knob clockwise. Manually turn helm starboard until the rudder stops at starboard lock (H.O.). The value on the display is the angle read by the rudder feedback unit before any adjustment is made.

  • Page 105: Rudder Test

    Configuration and setup Rudder Test If the boat uses power assisted steering, it is important that the Note ! engine or electric motor used to enable the power assist steering be turned on prior to this test. Bring the rudder manually to midship position before starting the test.
  • Page 106 Simrad AP25 Autopilot The Motor Drive out (displayed in percentage) is the amount of available power needed to achieve recommended rudder speed when on automatic steering Maximum speed (100%) is used in NFU mode. See also “Final Sea Trial” on page 132.

  • Page 107: Drive Engage

    Configuration and setup Drive engage This determines the use of the autopilot computer drive engage port (BYPASS/ CLUTCH terminals). The port voltage is the same as the selected drive unit voltage. Drive engage has the following settings: Bypass/clutch: The port will activate (go high), in all autopilot steering modes, and typically engages a bypass valve on a hydraulic linear drive or a clutch on a mechanical drive when entering any of the active autopilot modes.

  • Page 108: Wind Setup

    Simrad AP25 Autopilot Range: AUTO, 0.1° to 4.0° in 0.1° increments. Default: AUTO. Proceed to the next menu item by pressing the STBD button. The rudder deadband setting is not available when the autopilot Note ! is configured for Virtual feedback.

  • Page 109: Minimum Wind Angle (Racing)

    Configuration and setup Minimum wind angle (RACING) If ‘Wind setup’ is set to RACING, you can set different minimum wind angles for port and starboard. The difference between port and starboard wind angles will be taken into account when calculating the Estimated Time to Turn (ETT) and Distance To Turn (DTT).

  • Page 110: Wind Shift Limit (Racing)

    Simrad AP25 Autopilot A turn performed without shifting wind side, will also be made at a reduced turn rate. Shifting wind side when gybing, however, is an instant action from the autopilot and there is no limitation of the turn rate when making a gybe.

  • Page 111: Dockside Settings When Configured For Virtual Feedback

    Configuration and setup Dockside settings when configured for Virtual Feedback The Virtual Feedback algorithms in the autopilot software enable your autopilot to steer without having to mount a conventional rudder feedback unit. These algorithms are designed for vessels up to 40 ft. powered by outboard or stern drives only. Installing a feedback unit, however, will always enhance the performance of an autopilot and provide an accurate rudder angle indicator on the autopilot display.
  • Page 112 Simrad AP25 Autopilot Virtual Feedback calibration To perform the Virtual Feedback calibration and rudder test you must be able to view the movement of the engines/drives (“rudder”). The Virtual feedback calibration is entered as a numerical value equal to the physical rudder angle observed at the hard over position.
  • Page 113 Configuration and setup If the rudder is not moving so as to give a starboard turn, press and hold the TURN/DODGE button for another 3 seconds. When the rudder is moving to starboard, turn the course knob clockwise to confirm. While observing the rudder, use the wheel to turn the rudder hard over to starboard position.
  • Page 114 Simrad AP25 Autopilot The rudder will now be automatically centered. Note! The reading in the rudder angle display is not showing a rudder angle, only the direction of the rudder movement. The Rudder test is verified by the display showing ‘Motor OK’ or ‘Failed’.

  • Page 115: Interface Settings

    Configuration and setup Interface Settings Sets the format of the clock/data output for radars connected to the Autopilot Computer. Step to the Interface part of the Installation Menu. Turn the course knob clockwise to access the Interface Setup items. Use the course knob to select the connected type of radar.

  • Page 116: Sea Trial

    Simrad AP25 Autopilot Available units are: Wind Speed: kt or m/s Sea temperature: °F or °C Depth: m or ft Exit the Display units menu by pressing STBD button to proceed to the Sea trial menu, or press STBY to return to normal AP25 operation.

  • Page 117: Set Rudder Zero

    Configuration and setup Select Seatrial by pressing the STBD button and confirm by rotating the course knob clock-wise. Set Rudder zero (Not applicable when configured for Virtual feedback) This adjustment should be made in calm sea and side forces from wind or current should be avoided.

  • Page 118: Compass Calibration

    RATE-0 = Rate compass, FLUX-0 = Fluxgate compass on HS terminals. If an optional NMEA compass from Simrad or another manufacturer is installed, also refer to the optional compass’ manual regarding calibration. This compass will not be calibrated by the autopilot.
  • Page 119 Configuration and setup The calibration should be done in calm sea conditions and with minimal wind to obtain good results. Use about 60-90 seconds to make a full circle. Increase speed: >>>>> Decrease speed: <<<<< Appropriate speed: > < 1. Select the ‘Calibration’ item on the display 2.

  • Page 120: Compass Offset

    Simrad AP25 Autopilot compass to a different location. The local field angle will aid you to the local interfering magnetic object. See drawing. Lubber line Lubber line Magnitude of local field in % of earth’s magnetic field. Direction of local field with respect to lubber line.

  • Page 121: Set Thrust Direction

    Configuration and setup Select the amount of correction by turning the course knob to offset the heading to agree with the known, accurate heading. The Offset value can be either positive or negative. If an OFFSET still exists after having compensated for it, one of Note ! the following problems may still exist: •...

  • Page 122: Wind Offset

    Simrad AP25 Autopilot Wind Offset This offset only applies if you have a wind transducer directly Note ! connected to SimNet (IS12TW) or a wind transducer that outputs data on NMEA2000 format. The Wind Offset feature allows you to correct for a fixed wind angle offset.

  • Page 123: Depth Offset

    Configuration and setup through water. If none of these are available, the AWF will use a boat speed that is 1.5 times the Transition Speed set in the Installation/Seatrial menu. Turn the course knob to adjust the wind damping. Range: 1 – 100 seconds Default: 15 seconds Depth Offset This adjustment only applies to “smart”...
  • Page 124 Simrad AP25 Autopilot Recommended speed during Automatic tuning varies with the type of boat, but should not exceed 10 knots. It should be performed in calm or moderate sea conditions. Automatic tuning should not be performed at planing speed or in...

  • Page 125: Transition Speed

    Configuration and setup Transition Speed The transition speed is the speed where the AP25 will automatically change the steering parameter set from HI to LO parameters, or vice versa (page 22). The default setting of transition speed is 5 kts. It is recommended that you set the transition speed to a speed that represents the speed where the hull begins to plane, or the speed where you change from slow to cruising speed.

  • Page 126: Nav Change Limit

    Simrad AP25 Autopilot NAV change limit In NAV mode, when the required course change at the approaching waypoint is bigger than the set limit, you are prompted to verify that the upcoming course change is acceptable. The limit can be set to 10°, 20°...
  • Page 127 Configuration and setup different at slow speed as compared to cruising speed and both situations have to be compensated for individually. This adjustment must be made when steering in dead calm sea. Confirm by turning the course knob clockwise. Note! This menu item can also be accessed directly in Auto mode.

  • Page 128: Parameters

    Simrad AP25 Autopilot Parameters A boats steering parameters found by the Automatic tuning can be looked at and if needed changed under this menu item. The steering parameters can also be set manually instead of performing an Automatic tuning. The parameters are divided into two sets (page 23): •...
  • Page 129 Configuration and setup The two most important parameters that determine the performance of the automatic steering are Rudder and Counter Rudder. Rudder sets the rudder gain which is the ratio between the commanded angle and the heading error. Course to steer Too little Rudder Course to steer Too much Rudder...

  • Page 130: Recall Autotuned

    Simrad AP25 Autopilot New course Correct setting of counter rudder, ideal response Autotrim standard value is 40 sec. which should work well on most boats. Rudder Limit should be kept at 20 degrees unless there is a need for more rudder when performing dockside manoeuvres.

  • Page 131: System Data Menu

    Configuration and setup System Data Menu Select System data by rotating the course knob clockwise. This menu provides you with additional system data that can be useful when testing or trouble shooting the system. Steer compass Steering Compass readout, M=Magnetic, T=True Rudder Rudder angle.

  • Page 132: Nmea Port Test (Ac Hardware)

    Simrad AP25 Autopilot For all data items, one of the following codes will be displayed: – – – No data or no NMEA sentence containing the data needed is available at the input port. Valid data found Message with invalid information.

  • Page 133: Simnet Setup

    Proceed to the Simnet Setup menu by pressing the STBD button, or press STBY to return to normal AP25 operation. Simnet setup Group selection SIMRAD: Autopilot is part of the Simrad Group. Source selection will be common for the products in the group (synchronized).

  • Page 134: Master Reset

    ‘Yes’, all other units display ‘No’. Global SimNet reset Resets the entire SimNet setup in the Simrad Group and initiates a new automatic interface setup. See chapter 4.1. Master Reset A Master Reset is part of the final test at the factory, which will Note ! reset the memories to factory settings.

  • Page 135: Providing User Training

    Configuration and setup • If the hardware for automatic HI/LO selection is connected and configured, verify that the HI/LO transition is occurring, and the HI/LO parameters are changing after the transition speed is crossed (by more than 1 Knot higher or lower speed). •...
  • Page 136 Simrad AP25 Autopilot • Using the lock mode, how to lock/unlock and how to shut the system down from a locked control unit, if applicable. • Use of the Non-Follow-up and Follow-up steering modes and learning the difference between the two.

  • Page 137: Maintenance

    Maintenance 5 MAINTENANCE Control unit The AP25 Control Unit will under normal use require little maintenance. If the unit requires any form of cleaning, use fresh water and a mild soap solution (not a detergent). It is important to avoid using chemical cleaners and hydrocarbons such as diesel, petrol etc.

  • Page 138: Exchange Of Software Programme

    Simrad AP25 Autopilot Exchange of software programme Autopilot Computer Autopilot Computer EPROM Figure 5-1 AC10/AC20/AC40 Main PC-Board • Remove the EPROM from the socket by means of the special extraction tool (p/n 44139806). • Insert the tool by pressing the two grip pins down into the two slots in the corners of the socket.

  • Page 139: Autopilot Control Unit

    Maintenance Autopilot Control Unit You will need a special kit for a PC to perform the programming of the AP25 Control Unit. Order the following from Simrad: Programming kit P/N 22088595. Instructions are included. Software download connector Figure 5-2 Part of AP25 PCB Remove the cables and unscrew the six screws that secure the back cover.
  • Page 140 Simrad AP25 Autopilot This page is intentionally left blank. 20221495F...

  • Page 141: Trouble Shooting

    Refer to the table below for hints and try to solve the problem yourself. You may also consult your nearest Simrad dealer for assistance, if required. Perform any repair action in the listed sequence. Notes! 1.
  • Page 142 Simrad AP25 Autopilot Display readout Probable fault Recommended action Shallow water The depth is inside 1. Carefully observe the actual the set limit or outside depth. the range, i.e. 100 m 2. Adjust the alarm limit if not (328’) hazardous.
  • Page 143 Trouble shooting Display readout Probable fault Recommended action Rudder test failed Following conditions Refer to recommended actions for may exist: the specific probable faults. a) Rudder feedback failure b) Autopilot Computer current overload c) Bypass/clutch overload Rudder moves in only a) Check the connections one direction b) Replace the Autopilot Computer...
  • Page 144 Simrad AP25 Autopilot Display readout Probable fault Recommended action Failure active Active control unit 1. Press the STBY button on an Control Unit goes silent. "Inactive" unit to reset. 2. Check/repair RobNet2 cable. 3. Replace the control unit PCB. ACXX current The drive unit shut 1.
  • Page 145 Trouble shooting Display readout Probable fault Recommended action Com. failure with Faulty Autopilot 1. Check Robnet2 connectors and ACXX Computer or poor cable. Robnet2 cable 2. Replace Autopilot Computer Main connections from PCB. the same. Low supply Mains voltage less 1.

  • Page 146: Spare Parts List

    Simrad AP25 Autopilot 7 SPARE PARTS LIST AP25 Control Unit 22087811 AP25 Control Unit 22088405 Standard mounting kit consisting of: 22084693 Gasket (2 mm) 22086029 Gasket (7.5 mm) 22084529 Cabinet corner 44165181 Screw 3,5x19 44165645 Screw 3,5x32 22084941 Optional mounting bracket consisting of:...
  • Page 147 Spare parts list 22081434 AC10/AC20 Base plate 22082036 AC40 Base plate 22081350 Main cover 22081368 Terminal cover RFC35 Electronic Fluxgate Compass 22086995 RFC35 Fluxgate Compass 22081442 Installation accessories consisting of: 20104972 Mounting plate (2) 44140762 Screw 3.5x25 (2) 44140770 Screw 30x9 (4) 22081376 Plug (2) 22081178 RFC35 PCB Ass'y...
  • Page 148 Simrad AP25 Autopilot Robnet2 cables 24005613 Robnet2 cable, 1 m (3’) with two plugs 24005621 Robnet2 cable, 5 m (16’) with two plugs 24005639 Robnet2 cable, 10 m (33’) with two plugs 24005647 Robnet2 cable 15 m (49’) with one plug...

  • Page 149: Technical Specifications

    NMEA output sentences:.. BWC, BWW, GLL, HDG, HDM, HDT, HSC, RMB, RMC, RSA, VTG, XTE. See chapter 8.13 for NMEA0183 details. Optional output: ....Simrad and Furuno radar display (clock/data) NMEA2000 interface..Via SimNet port and SimNet/NMEA2000 adapter cable 20221495F...
  • Page 150 Heading sensors: Standard: ......RC36 Rate Compass Options:......RFC35 Electronic Fluxgate compass NMEA Compass (Not AC10) Simrad RGC50/RGC10 gyrocompasses * * By GI51 Course Selection:....... Rotary course dial and push button Alarms: ........Audible and visual, optional external Alarm modes: ......Off course, system failures, overload Steering modes: ......

  • Page 151: Ap25 Control Unit

    Technical specifications AP25 Control Unit Dimensions: ....... See Figure 8-1 Weight: ........0,5 kg (1.1 lbs) Power consumption ....3 W Display: Type: ......... Backlit LCD matrix display Resolution: ......160 x 128 pixels Colour: ........Black Illumination: ......Adjustable in 10 steps Environmental Protection:..

  • Page 152: Autopilot Computers

    Simrad AP25 Autopilot Autopilot Computers Dimensions: ....... See Figure 8-2 and Figure 8-3 Weight: AC10/AC20 ...... 1,3 kg (2,9 lbs.) AC40......... 2,8 kg (6,2 lbs) Supply voltage: AC10......... 10-28V DC AC20/AC40 ...... 10-40V DC Reverse voltage protection ..Yes (not AC40) Power consumption: ....
  • Page 153 Technical specifications Figure 8-2 AC10/AC20 Autopilot Computert - Dimensions Figure 8-3 AC40 Autopilot Computer - Dimensions 20221495F...

  • Page 154: Rc36 Rate Compass

    Simrad AP25 Autopilot RC36 Rate compass Dimensions: ....... See Figure 8-4 Weight: ........0,9 kg (2,0 lbs) Supply and interface:....RobNet2 Power consumption: ....0,9 watts Automatic Performance: Calibration: ....... Automatically activated by control head Gain compensation: ..Automatically adjusted continuously Rate sensor stabilized heading output Accuracy:........

  • Page 155: Rfc35 Fluxgate Compass

    Technical specifications RFC35 Fluxgate compass Dimensions: ....... Same as RC36. See Figure 8-4 Weight: ........0,9 kg (2,0 lbs) Supply and output:..... Polarity independent 2-wire supply with superimposed pulse width modulation Automatic Performance: Calibration: ....... Automatically activated by control head Gain compensation: ..
  • Page 156 Simrad AP25 Autopilot Transmission link: ..... Stainless 350mm (13.8") with 2 ball joints. Ball joint stud for rudder arm requires 4.2mm diameter hole and 5mm tap. Figure 8-5 RF300 Rudder Feedback - Dimensions Figure 8-6 Transmission link - Dimensions 20221495F...

  • Page 157: R3000X Remote Control

    Technical specifications R3000X Remote Control Dimensions: ..See Figure 8-7 Weight:.... 0,4 kg (0,9 lbs) Material:..Epoxy coated aluminium Protection ..IP56 Safe distance to compass: 0.15 m (0.5 ft.) Temperature range: Operation: ...–25 to +55 °C (–13 to +130 °F) Storage: ..–30 to +70 °C (–22 to + 158 °F) Cable length: ...

  • Page 158: Fu25 Steering Lever

    Simrad AP25 Autopilot FU25 Steering Lever Dimensions: ....... See Figure 8-9 Handle can be mounted pointing upwards or downwards. Weight: ........1.2 kg (2.6 lbs.) including cable Material:........Polyacetal (POM) Environmental Protection:..IP56 Power consumption: ....3W Safe distance to compass: ..0.15 m (0.5 ft.) Temperature: Operating: ......

  • Page 159: Is15 Rudder

    Technical specifications 8.10 IS15 Rudder Dimensions: ....... See Figure 8-9 Weight: ........225 grams Environmental Protection:..IP56 from front, IP44 from rear Power requirement: ....12/24 VDC, 70 mA (100 mA max with max lighting) Safe distance to compass: ..0.15 m (0.5 ft.) Temperature: Operating: ..

  • Page 160: Simnet

    Simrad AP25 Autopilot Figure 8-10 IS15 Rudder - Dimensions 8.11 SimNet Maximum number of products connected in a network:........50 Maximum cable length: ..............120 m (400’) Bit rate of the bus: .................250 Kbit/second Maximum DC current through a single SimNet plug ......... 5A SimNet power supply: ....

  • Page 161: Ip Protection

    Technical specifications 8.12 IP protection Each part of a Simrad autopilot system has a two digits IP protection code. The IP rating is a method to classify the degree of protection against solid objects, water ingress and impact afforded by electrical equipment and enclosures.

  • Page 162: Nmea And Simnet Messages

    Simrad AP25 Autopilot 8.13 NMEA and SimNet messages NMEA0183 messages and data overview for AC10, AC20, AC40 Message ident. Data source: p p p (n/p/h=nav/pos/heading source, c=calculated) Accept. cond P P P . (N=nav. flag, P= pos. flag) Status flag...
  • Page 163 Technical Specifications Remarks: Indata use p p n n n n n P P* N N N* N* N N * Pos flag or NMEA version 3.01 N/P=nav/pos data warning, *DGPS if flag=2 1 3* x * Only if Magnetic variation is present 10 10 2 5 10 * HDG out if magn.
  • Page 164 Simrad AP25 Autopilot SimNet/NMEA2000 messages and data overview Message ident. Data source: N=nav, P=pos, H=heading, D=depth, Wa=Wind apparent, P P P P P P P Wt=Wind True, WaS=Water Speed/ WaT=Water temp, Dl=Distance log, C=Calculated) Compass heading Compass Data Rudder Data...
  • Page 165 Technical Specifications Remarks: Indata use * SimNet proprietary x In INFO views Depth+Offset is displayed if x offset is present *Only transmitted if NMEA183/RC36/RFC35 is source x* x* x* Date of change: 20.12.2005 20221495F...

  • Page 166: Glossary

    Simrad AP25 Autopilot 9 GLOSSARY Apparent wind – The speed and direction from which the wind appears to blow with reference to the bow when the boat is moving (also called relative wind). Arrival alarm – An alarm signal issued by a GPS/chartplotter that indicates arrival at or at a predetermined distance from a waypoint.
  • Page 167 SimNet controller. When connected to SimNet they will automatically pick the first available source on SimNet and lock on to that. When a Class 1 product is added to the Simrad Group, Class 2 products will automatically subordinate themselves to the Class 1 source selection.
  • Page 168 Simrad AP25 Autopilot True bearing – Bearing relative to true north; compass bearing corrected for compass error. True heading – Heading relative to true north (the meridian). Waypoint - A discrete point, stored in a navigator, located on the surface of the earth. Normally this point will be identified by Lat/Lon coordinates although in some systems it may be shown by T.D.'s.

  • Page 169: Index

    Index 10 INDEX course to steer, 37, 58 cross track error, 37, 47, 166 C-turn, 25, 55 alarm external, 93 listing, 139 apparent wind, 42, 47, 164 depth offset, 121 arrival circle, 39 depth source, 54 auto source update, 53 depth unit, 113 automatic tuning, 121 depth-turn, 30, 55...
  • Page 170 Simrad AP25 Autopilot standby, 16 turn, 24 illumination. See backlight wind, 41 Init NAV, 123 multiple station, 48 instrument installation, 91 log, 55, 61 NAV change limit, 124 main, 55, 61 NAV source, 50 menu, 60 Nav/Wind, 51 motorway, 55, 61...
  • Page 171 Virtual feedback, 100, 109, source, 131 124, 125 SimNet messages, 162 VMG, 47, 59, 107 SimNet source, 165 Simrad group, 131 software program exchange, water speed source, 54 water temperature source, 54 software setup, 95 water temperature unit, 113 source manually update, 53...
  • Page 172 Simrad AP25 Autopilot wind vane steering, 41 zigzag-turn, 27, 55 20221495F...

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