Garmin 300XL Pilot's Manual And Reference
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Garmin 300XL Pilot's Manual And Reference

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3 0 0 X L
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G u i d e
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Summary of Contents for Garmin 300XL

  • Page 1 G N C 3 0 0 X L P i l o t ’ s G u i d e a n d R e f e r e n c e...

  • Page 3: Foreword

    Tel: 913-397-8200 GARMIN (Europe) LTD, Unit 5, The Quadrangle, Abbey Park, Romsey, Hampshire S051 9AQ, UK Tel: 011-44-1794-519944 GARMIN (Asia) Corp., 4th Fl., No. 1, Lane 45, Pao-Hsing Road, Hsin Tien, Taiwan R.O. C. Tel: 011-886-02-2917-3773 Web Site Address: www.garmin.com All rights reserved.
  • Page 4 (NAVAID), any NAVAID can be misused or misinterpreted and therefore become unsafe. Use the GNC 300XL at your own risk. To reduce the risk of unsafe operation, carefully review and understand all aspects of this Owner’ s Manual and the Flight Manual Supplement, and thoroughly practice using the simulator mode prior to actu- al use.
  • Page 5 Accessories & Packing List Congratulations on choosing the finest, most advanced panel mount IFR GPSCOM available. The GNC 300XL represents GARMIN’ s commitment to provide an accurate, easy-to-use GPS for all of your aviation needs. Before installing and getting started with your unit, please check to see that your package includes the following items.

  • Page 6: Warranty

    (913) 397-8200 FAX (913) 397-8282 Every GARMIN GPS is built to exacting standards to provide years of trouble-free service. GARMIN warrants this product to be free from defects in materials and workmanship for one year from the date of purchase.

  • Page 7: Table Of Contents

    Key and Knob Functions ........vii-viii GNC 300XL Takeoff Tour ........1-10 PART TWO: REFERENCE N key) .

  • Page 8: Table Of Contents

    Appendix C: Simulator .........115 Appendix D: GNC 300XL Messages and Abbreviations ....117 Appendix E: Specifications .

  • Page 9: Key And Knob Functions

    In general, using the knobs will decrease key- strokes and time spent using the GNC 300XL. Experiment to find the most effective way to use the GNC 300XL to your advantage.
  • Page 10 The message key is used to view system messages and to alert you to important warnings and requirements. This key is also used to access the GNC 300XL’ s unit settings. See Section 7 for more information on messages and unit settings.

  • Page 11: Gnc 300Xl Takeoff Tour

    Prior to using your GNC 300XL for the first time, we recommend that you taxi to a location that is well away from buildings and other aircraft so the unit can collect satellite data without interruption.

  • Page 12: Acquiring Satellites

    This is a good indication that you are receiving signals and satellite lock will occur. Following the first-time use of your GNC 300XL, the time required for a position fix will vary — usually from one to two minutes.
  • Page 13 While the GNC 300XL is acquiring a position, let’ s take a minute to dial in the active and standby frequencies you’ll be using for the first phase of your flight. The GNC 300XL’ s display can be broken down into two separate ‘windows’ (or screen areas), the comm window (the top line of the display) and the GPS window (the bottom three lines of the display).
  • Page 14 • Present Position— Latitude and longitude displayed in degrees/minutes • Reference Waypoint— The bearing and distance to the nearest airport The position page is one of seven pages available under the GNC 300XL’ s N key: • CDI page • NAVCOM page •...
  • Page 15 The GNC 300XL uses direct point-to-point navigation to guide you from takeoff to touchdown in the IFR environment. Once a destination is selected, the unit will provide speed, course and distance data based upon a direct course from your present position to your destination.
  • Page 16 CDI page with ‘trk’ and ‘eta’ displayed. CDI page with ‘brg’ and ‘trk’ displayed. In addition to the destination field and graphical CDI, the GNC 300XL CDI page features four selectable fields for various navigation data so that the page may be con- figured to your own preferences (see Section 1 for more information).
  • Page 17 Communication frequencies are shown in the top left corner of the map page, instead of across the top line as shown on other GNC 300XL screens.

  • Page 18: Navcom Page

    2. Rotate the knob counterclockwise to decrease the map scale and show a smaller area. Another page available under the GNC 300XL’ s N key is the navigation communications (NAVCOM) page. It provides you with a complete list of airport frequencies at your departure and arrival airports, allowing convenient selection of frequencies you’ll need along your flight path.

  • Page 19: Nearest Waypoints

    2. Press 3. Press The GNC 300XL’ s T key provides the nine nearest airports, VORs, NDBs, inter- sections, user waypoints and any SUA (special use airspace) alerts, as well as the two closest FSS (Flight Service Station) and center (ARTCC) frequencies for your present position.

  • Page 20: Nearest Airports

    30 seconds when the unit senses that power is off. After 30 sec- onds, the GNC 300XL will shut off. If you wish to continue operating the unit, press any key during the countdown period, and the unit will operate from the battery.

  • Page 21: Section 1: Navigation With The Gnc 300Xl ( N Key)

    Whenever the N key pages are in use, the indicator light (U) next to the N key will illuminate. If the GNC 300XL requires you to enter data on a navigation page, a message prompt with specific instructions will appear and the indicator will flash.
  • Page 22 CDI field will display a ‘no actv wpt’ message, and only speed and track data will be available. The CDI field is also used to display the GNC 300XL’ s turn anticipation and waypoint alert data during route operations (see Section 5).
  • Page 23 The following functions may be displayed in the ground speed field: • gs— Your present speed over the ground. • str— Steer direction and distance, or digital crosstrack error. An ‘L’ or ‘R’ indicates which direction to steer, while the distance value indi- cates how far you are off course.
  • Page 24 Selected Course The GNC 300XL’ s course select feature allows the pilot to define the inbound course to, or outbound course from, the ‘active’ waypoint, using an external HSI. Once the course select function is activated, the selected course will be displayed next to the destination waypoint identifier and the CDI will provide guidance relative to the desired course.
  • Page 25 Data Fields The next page available from the GNC 300XL’ s N key is the map page. The map page displays your present position, using an airplane symbol (in track up mode) or a position diamond (in other orientation modes), along with nearby airports, VORs, NDBs, intersections, user waypoints and airspace boundaries.
  • Page 26 SECTION NAV KEY Map Page On the map page the active and standby commu- nication frequencies are in the upper left corner of the page. The active frequency is on top. To change the map scale rotate the K knob clock- wise to increase the scale or counterclockwise to decrease the scale.
  • Page 27 The next page available from the GNC 300XL’ s N key is the navigation commu- nications (NAVCOM) page. The NAVCOM page provides a list of the airport frequen- cies at your departure and arrival airports, allowing convenient selection of frequencies you’ll need along your flight path.
  • Page 28 The cursor will auto- matically advance to the next frequency on the list. The GNC 300XL position page displays your present latitude and longitude, alti- tude and a reference waypoint field. The altitude and reference waypoint fields are selectable to configure the page to your own preferences and current navigation needs.

  • Page 29: Reference Waypoints

    The altitude field can display either the present altitude, minimum safe altitude (MSA) or en route safe altitude (ESA). MSA is the recommended minimum altitude within a ten mile radius of your present position. ESA is the recommended minimum altitude within a ten mile radius of your course on an active route or direct-to. MSA and ESA altitudes are calculated from information contained in the database and gen- erally include mountains, buildings and other permanent features (see right).

  • Page 30: Satellite Status

    This allows the distance and bearing from any waypoint to be displayed continu- ously, which may be useful when an approach reference is not the closest navaid. The GNC 300XL’ s satellite status page provides satellite information to monitor GPS coverage and receiver performance. This is helpful when you may be experienc- ing low signal levels due to poor coverage or installation problems.
  • Page 31 The receiver status field, located at the top left of the page, will display the follow- ing messages under the appropriate conditions: Search Sky - The GNC 300XL is searching the sky for visible satellites. You will be informed with the message ‘Searching the Sky’.

  • Page 32: Receiver Status

    Press N to display the position page and enter the altitude. Not Usable - The GNC 300XL is unusable due to incorrect initialization or abnormal satellite conditions. Turn the unit off and on again. Autolocate - The GNC 300XL is looking for any satellite whose almanac has been collected.

  • Page 33: Trip Planning

    In addition to the other five pages, the GNC 300XL features two menu pages to perform a host of planning and navigation functions. NAV Menu 1 provides access to the following functions: • Trip Planning • Density altitude/true airspeed calc.

  • Page 34: Density Altitude

    NAV KEY SECTION Density Altitude & True Airspeed Density altitude/true airspeed page Fuel planning page showing calculation from pre- sent position to ‘KDAL’. The density altitude/true airspeed function is also accessed from NAV Menu 1. Density altitude is the theoretical altitude at which your aircraft will perform depending on several environmental conditions, including air pressure and total air temperature (the temperature including the heating effect of speed, read on a standard outside tem- perature gauge on most aircraft).
  • Page 35 Press The GNC 300XL will calculate the range and endurance (i.e., how long the fuel will last) of your aircraft. These are found in the first field on the bottom row of the page.

  • Page 36: Winds Aloft

    Winds aloft page Vertical navigation page The GNC 300XL’ s winds aloft function is used to calculate the true direction and speed of any winds, and indicates whether you are flying with a head wind or tail wind, and the wind speed.
  • Page 37 9. Press to activate the vertical navigation function. If you enter a value greater than the value computed by the GNC 300XL, the time remaining before the maneuver is to begin will be displayed. When the countdown reaches 15 seconds, you will be informed with the message ‘Start altitude chng’. The VNAV function will automatically be cancelled if the active direct-to or route is changed in any way, and you will be informed with a ‘VNAV cancelled’...
  • Page 38 1. To delete a checklist item, highlight the desired item and press 2. To delete an entire checklist, highlight the desired list and press The GNC 300XL’ s NAV Menu 2 provides access to various timer and planning func- tions, including: •...
  • Page 39 The GNC 300XL’ s trip timer will automatically keep track of the duration of your current trip and can be configured to run either when the GNC 300XL is on, or when your ground speed exceeds a specified value (see Section 7).

  • Page 40: Raim Prediction

    Receiver Autonomous Integrity Monitoring performs checks to ensure that the GNC 300XL will have adequate satellite geometry to work with during your flight. RAIM availability will be near 100% in Oceanic, En route and Terminal phases of flight.
  • Page 41 ‘Change oil’ to be displayed in 30 hours, the message ‘Change oil’ will be displayed after the GNC 300XL has been running in Normal mode for 30 hours. After appearing, the message will be displayed each time the GNC 300XL is turned on until it is changed or deleted. To enter a scheduled message: 1.
  • Page 42 Sunrise/sunset planning page showing UTC (Zulu) sunrise and sunset times for ‘KROG’. The GNC 300XL’ s sunrise/sunset planning function allows you to calculate the time of sunrise or sunset at any waypoint or your present position for a specified date.

  • Page 43: Section 2: Communicating With The Gnc 300Xl

    The GNC 300XL features a digital VHF radio that provides a seamless transition from communication to navigation, bringing the two most important functions in fly- ing together in one panel-mount unit. The GNC 300XL operates in the aviation voice band, from 118.000 to 136.975 MHz, in 25 kHz steps.
  • Page 44 To select a frequency from a list, highlight the desired frequency and press E. During the course of navigating with the GNC 300XL, there may be times when you need to quickly select a comm frequency while you are entering data in the GPS window.

  • Page 45: Emergency Channel

    1. Rotate the knob. Whenever the GNC 300XL is powered up, the automatic squelch will be in the ‘on’ position, allowing only transmissions which are powerful enough for clear broad- cast to be received. Manual squelch control is not available.

  • Page 46: Section 3: Waypoint And Database Information ( W Key)

    Waypoint information is available through four primary waypoint pages accessible from the GNC 300XL’ s W key. The waypoint pages may be scrolled through by press- ing the W key and rotating the outer knob until the desired page is displayed, or by pressing the W key repeatedly.

  • Page 47: Waypoint Categories

    The GNC 300XL organizes waypoints into one of five waypoint categories for your convenience. Each waypoint category provides different types of detailed information for a selected facility: • Airports - Identifier, city/state, country, facility name, position (lat/lon), elevation, fuel services, control and approach information, IFR procedures, runways and communication frequencies.

  • Page 48: Entering Waypoints

    5. Use to enter the location or the name, and press As the information is entered, the GNC 300XL will display any entries in its data- base that match the letters you have entered. If duplicate entries exist for the entered identifier, name or location, additional entries may be viewed by rotating K.

  • Page 49: Airport Information

    Once a waypoint category and identifier have been selected, the GNC 300XL will provide extensive information through a set of waypoint pages for the selected cate- gory. The pages available for each waypoint category are presented here in the order they appear on the waypoint menu page: airports, VORs, NDBs, intersections and user waypoints.
  • Page 50 Airport runway page. The down arrow next to the identifier indicates additional runways may be displayed by rotating the K knob. The GNC 300XL features six airport pages: airport identification— allows entry of desired airport by identifier, facility name or city; displays region and/or country of facility.
  • Page 51 Elevation— In feet or meters Usage/Fuel— If the airport is for military use, it will display ‘military’. If it is private, the GNC 300XL will display ‘private’. If it is a public airport, it will display the fuel type(s) available: •...
  • Page 52 Whenever there are more than two available procedures for a selected category, the GNC 300XL will display a scrolling arrow prompt on the left side of the list. To view additional procedures, simply rotate K with the cursor removed. As you scroll through the list, the arrow prompt will point “down”...
  • Page 53 The airport communication page displays the radio frequencies and usage for the selected airport, as well as sector and altitude restrictions. To view the communication page from any of the airport information pages: 1. Rotate with the cursor removed to display the communication page. 2.
  • Page 54 WPT KEY SECTION Airport Runway Page Airport runway page for KICT. To view additional runways, rotate the the direction of the arrow prompts. The airport runway page displays runway designations, length, surface and lighting for the selected airport, as well as ILS/localizer and/or pilot-controlled lighting frequencies.

  • Page 55: Vor Information

    VOR Information The GNC 300XL features three VOR waypoint pages: VOR identification— allows entry of desired VOR by identifier, facility name or city; displays region and/or country of facility. VOR position— allows entry of desired VOR by identifier; displays latitude, longitude and frequency; provides magnetic variation, weather broadcasts and DME/TACAN information.

  • Page 56: Ndb Information

    NDB Information NDB Position Page The GNC 300XL also uses identification, position and comments pages for NDB information. The NDB waypoint pages are used in the same manner as VOR pages: NDB information is accessed by entering the desired facility’ s identifier, city or name (see page 38) on the NDB identification page.
  • Page 57 Intersection Information Intersection Position Page The last database waypoint category available is intersections. Two intersection pages are available: intersection position and intersection comments. Intersections may be entered by identifier only (not city or name) on either intersection page. To scroll through the intersection pages: 1.
  • Page 58 In addition to the airport, VOR, NDB and intersection waypoints contained in your NavData® card, the GNC 300XL allows you to store up to 1,000 user-defined way- points. Once a user waypoint is created, two user waypoint pages will display the fol- lowing information: •...

  • Page 59: User Waypoints

    If the waypoint identifier entered does not exist, you will be prompted to select a method to enter the new waypoint’ s position into memory. If the waypoint exists (i.e., you’re just reviewing or editing a user waypoint), skip step 4 and move on to the next set of instructions.
  • Page 60 To create a user waypoint from your present posi- tion, leave the reference waypoint field blank and enter a bearing and distance from your present position. The GNC 300XL will calculate the new waypoint’s coordinates automatically. To enter/edit a user waypoint position from a reference waypoint: 1.

  • Page 61: Creating Waypoints

    This will display the ‘Save waypoint’ screen, which will allow you to rename the waypoint and choose the route to which it should be added. The GNC 300XL will assign the next available three-digit number as the default waypoint name, preceded by a ‘+’...

  • Page 62: Proximity Waypoints

    ‘Proximity overlap’. This message will be displayed each time you turn on the GNC 300XL for as long as the overlap remains. Warning: If you enter the overlap area you will only be informed of the nearest proximity waypoint.

  • Page 63: User Waypoint

    The third page available from the GNC 300XL’ s W key is the user waypoint list, which can be used to quickly scan, review, rename or delete user waypoints. To display the user waypoint list: 1. Press and use to display the user waypoint list.
  • Page 64 Entering waypoint comments. Waypoints with comments page The last page available through the GNC 300XL’ s W key is the waypoints with comments page, which lists all waypoints that have a user comment. User com- ments may be added to 250 waypoints stored in the user or NavData allow you to note two lines of special information concerning a particular waypoint.
  • Page 65 If there is more than one waypoint available for a selected identifier, the GNC 300XL will display a duplicate waypoint page for you to choose the desired waypoint. The waypoint identifier and number of duplicates will be shown at the top of the page, with the waypoint type and region of each duplicate indicated below.

  • Page 66: Waypoint Scanning

    (identifier, facility or city name). 5. Use to enter the letters of the identifier, city or facility name. The GNC 300XL will scan the database and display the first waypoint that matches your entry. 6. Press to accept the waypoint, and function being used.

  • Page 67: Section 4: Nearest Waypoints ( T Key)

    FIR) points of communication, plus alert you to any Special Use Airspace (SUA) you may be in or near. The T key can be used in conjunction with the GNC 300XL’ s direct-to function to quickly set a course to a nearby facility in case of an in-flight emergency.
  • Page 68 O. Rotating O continuously to the left will stop page selection on the nearest airport category. The next page available under the GNC 300XL’ s T key is the SUA (special-use airspace) alert page. The SUA alert page will alert you to as many as nine controlled or restricted airspaces near or in your flight path, according to the following conditions: •...
  • Page 69 To toggle between the SUA name and controlling agency display: 1. Rotate one stop in either direction. If the SUA name or controlling agency is too long to fit on the display, the GNC 300XL will automatically scroll to display the rest of the information. Alert type...
  • Page 70 Frequency information for SUA. If the informa- tion is too long to fit on the display, the GNC 300XL will automatically scroll to display the rest of the information. The following SUA types can appear in the SUA type field:...
  • Page 71 All SUA alert messages except for prohibited areas may be turned on or off through the GNC 300XL’ s unit settings options, found under the M key (see page 108). Alerts for prohibited areas will always be displayed, regardless of unit settings or operating mode.

  • Page 72: Section 5: Direct-To ( D Key) & Route Navigation ( R Key)

    ACTIVE LEG KTUL As you pass each waypoint in the route, the GNC 300XL’ s automatic leg sequenc- ing and turn anticipation features will automatically select the next waypoint as the ‘active to’ waypoint and provide smooth steering guidance around the turn. If you are not currently navigating a particular route leg (e.g., your starting position is not a...
  • Page 73 1. Place the cursor over the destination field on the CDI page. 2. Press \. The destination field will go blank. 3. Press E. The GNC 300XL will resume navigating route 0 (the active route) if available. to accept the direct-to confirmation page.
  • Page 74 5. Press to accept the course, and The GNC 300XL will now use the selected course for your CDI and DTK steering guidance. To reset the course to a GPS-calculated course from your present position, simply press D, followed by E.
  • Page 75 Routes 1-19 are used as storage routes, which are stored in the GNC 300XL’ s inter- nal memory. Once a storage route is ‘activated’, a copy is placed into route 0 for navi- gation until it is cancelled, overwritten by activating another route or erased when the unit is turned off.
  • Page 76 4. Cumulative distance of route 5. Comments/Parallel track offset field The GNC 300XL’ s route catalog page is used to create, edit, delete or copy routes, and serves as the main page for a host of functions. These include route activation, deter- mining the closest point of approach and search-and-rescue operations.

  • Page 77: Editing Routes

    The route editing function allows you to create new routes and edit existing routes. Creating routes before takeoff can help make route operations faster and easier during your flight. To create or edit a route from the route catalog page: 1.

  • Page 78: Activating Routes

    ‘activate?’. Press After travelling a route or creating a route with the GNC 300XL’ s AutoStore™ fea- ture, the route activation field may be used to activate the route in reverse order. To activate a route in reverse order: 1.

  • Page 79: Copying Routes

    To copy a route: 1. Press and use to display the route catalog page. 2. Use to display the route to which you would like to copy to. The route must be empty. 3. Press twice and rotate to select ‘copy?’. Press 4.
  • Page 80 Performing a search-and-rescue operation. The GNC 300XL’ s search-and-rescue function provides navigation guidance for search-and-rescue operations, navigating in a ladder pattern to maximize coverage and efficiency. This is done in reference to two waypoints called ‘anchor waypoints’. The first leg will be a specified distance from the line connecting the anchor waypoints.
  • Page 81 The GNC 300XL’ s Route RAIM Prediction Function evaluates enroute RAIM availabil- ity over the entire route that the pilot intends to fly. Route RAIM Prediction ensures that satellite coverage will be sufficient to meet the protection limits defined by BRNAV/RNP-5 (FAA Advisory Circular 90-96).
  • Page 82 SECTION ROUTE NAV Route RAIM Prediction Figure 3 Figure 4 The time required for RAIM prediction computation depends on the route distance (i.e., 1000 nautical miles = approximately 2 minutes) and the enroute speed. The longer the route distance and the slower the enroute speed, the longer the time. If RAIM unavailability is detected based on the associated requirement, the prediction process will stop immediately and display ‘NO RAIM’...

  • Page 83: Parallel Track

    During route navigation, it is sometimes desirable to navigate a specified distance away from the ‘active leg’ to help avoid certain airspaces or regions. The GNC 300XL’ s parallel track feature will automatically guide you along a selected offset from the active leg.

  • Page 84: Active Route

    CDI pages and the role of the waypoint sequencing (GPS SEQ) switch, you’ll be able to get the most out of the GNC 300XL’ s advanced route and approach features. Whenever the GNC 300XL is navigating an approach, route or an on-route direct- to, the active route page will provide a list of the route waypoints in sequence, along with distance, time and course information.
  • Page 85 The distance field can be selected to display cumulative (‘cum’) distance or the dis- tance for each route leg (‘leg’). If cumulative is selected, the first leg’ s distance will be displayed. The second leg will represent the first leg’ s distance plus the second leg, and so on.
  • Page 86 ‘ok?’ prompt on the waypoint confirmation page. The GNC 300XL will now provide guidance to the selected waypoint and resume navigating the remainder of the route in sequence once you arrive at the next destina- tion waypoint. The waypoint sequencing field, located at the bottom left of the direct-to confirmation page, indicates the current status of the waypoint sequencing (GPS SEQ) switch.

  • Page 87: Turn Anticipation

    The GNC 300XL will automatically sequence to the next leg when you are abeam the ‘active to’ waypoint on the curved transition segment, and the to/from indicator on the CDI will flip momentarily.

  • Page 88: Section 6: Approaches, Sids And Stars ( R Key)

    The non-precision approaches available in the GNC 300XL are executed using the GPS route features covered in Section 5, so it’ s important to understand routes before attempting approach navigation. A GPS approach is a sequence of waypoints linked together as an approach route which replaces your destination airport waypoint when selected.
  • Page 89 The NAV/GPS switch determines which data (GPS or NAV1) will be displayed on the HSI and used by the autopilot/flight director. The current selection will be indi- cated by an annunciator light. If power to the GNC 300XL is lost, the system will automatically revert to NAV1.
  • Page 90 (e.g., procedure turn, IAF and FAF at the same waypoint). Whenever the GPS SEQ switch is set to the HOLD position, the GNC 300XL allows you to select the desired course to/from a waypoint using the HSI, much like a VOR.
  • Page 91 Think through the approach examples— this will assist you in getting the greatest benefit from the GNC 300XL. There are a few basic rules that apply to all GPS approaches. Remembering these rules will assist you in understanding the approach procedures and ensure the greatest margin of safety for your flight.
  • Page 92 • During a GPS approach, keep in mind that your external HSI will display the same CDI needle deflection and scale as the CDI on the GNC 300XL, which will transition from 5.0 to 0.3 nm through the approach. Also note that unlike...
  • Page 93 Flying A Typical Approach The non-precision approaches available from the GNC 300XL will all follow the same general flow of events described below. Specific details and instructions relating to each step, along with several approach examples are provided later in this chapter.
  • Page 94 6. Missed Approach Procedure The GNC 300XL’ s automatic waypoint sequencing stops at the missed approach point. Once you have crossed the MAP, the GNC 300XL will give you the option of flying direct to the missed approach holding point: a.
  • Page 95 Selecting and Loading an Approach When an arrival airport is selected with the direct-to key (or created and activated in a route to the arrival airport), the approaches for your arrival airport become available through the approach select page, which can be viewed by pressing R and rotating the outer knob.
  • Page 96 5.0 nm to the 1.0 nm scale as you make your way to the FAF. If the approach has been disarmed and the aircraft is within 3 nm of the FAF, the GNC 300XL will prompt you to re-arm the approach.
  • Page 97 Set the GPS SEQ switch to the AUTO position. The GNC 300XL will resume automatic waypoint sequencing for the remaining approach waypoints. 4. Once the aircraft is within 2 nm of the FAF (and the approach is armed), the ‘ACTV’ annun- ciator will illuminate and the CDI scale will ramp down to 0.3 nm.
  • Page 98 5. Set the GPS SEQ switch to the AUTO position for navigation to the missed approach holding point. After a missed approach, the GNC 300XL will allow you to repeat the same approach procedure and select the approach waypoint to which you have been cleared as the next active to waypoint.
  • Page 99 The GNC 300XL’ s approach select page allows you to review the available approach procedures at the destination airport. From the procedures list, you may select and activate a new procedure on the fly. The active approach is indicated by an on-screen asterisk, and the scrolling arrow prompt indicates which direction to scroll to view additional procedures.
  • Page 100 APPROACH NAV SECTION GPS Approach Examples BAY CITY ff13 344 BYY MAGUS 1800 116 (7.9) n13hp 10 NM Ref: NDB RWY 13 approach at Bay City TX (3R1) GPS APPROACH EXAMPLES In the examples that follow, the GPS waypoints are shown along the approach path.
  • Page 101 1. Select the destination airport (KFDK) using the to the destination airport. 2. Select the desired approach (GPS RW05) from the approach select page. The GNC 300XL will automatically select MRB as the IAF since it is the only IAF available.
  • Page 102 2. Fly towards the IAF (JAMES) of the approach. 3. Two nautical miles before crossing the IAF, set the GPS SEQ switch to the HOLD position. This prevents the GNC 300XL from automatically sequencing to the MAP (Riverside) before the required procedure turn is completed.
  • Page 103 (KFOE) and illustrates an approach based on a DME arc. Although DME arc approach- es are not based on a direct course, the GNC 300XL will still provide approach navigation guidance through the arc by constantly displaying your distance and bearing from the DME reference navaid on the position page.
  • Page 104 APPROACH NAV SECTION VOR/DME Arc Example VOR/DME RWY 21 TOPEKA/ FORBES FIELD (FOE) 3000 205 (7) TOPEKA (IAF) 2600 MISSED APPROACH CLIMB TO 3000 VIA HEADING 240 AND TOP R-213 TO ERASE 25 DME AND HOLD. ERASE 2600 MISSED APPROACH VORTAC CLIMB TO 3000 VIA HEADING 240 AND TOP R-213 TO...
  • Page 105 IAF from the database and set the GPS SEQ switch to HOLD while you fly the vectors to the active approach waypoint. To accom- modate radar vectors, the GNC 300XL allows manual selection of any approach way- point as the destination waypoint.
  • Page 106 Activating SIDs Selecting a SID. Selecting a SID transition. The Jeppesen database used in the GNC 300XL features standard terminal arrival routes (STARs) and standard instrument departures (SIDs) that may be placed into any active or stored route. Available SIDs may be selected for the departure airport at any time in the active route as long as the departure airport is the first route waypoint and the route con- tains more than one waypoint.
  • Page 107 The SID select page also allows you to review all the available SIDs for the depar- ture airport and select, delete or change the active SID. To replace/delete the active SID: 1. Press and rotate until the SID select page appears. 2.
  • Page 108 Selecting a STAR. Selecting a STAR transition. Standard Terminal Arrival Routes (STARs) used in the GNC 300XL are selected and activated with the same procedures as SIDs. Available STARs may be selected for the destination airport at any time in the active route as long as the destination air- port is the last waypoint in the active route or the direct-to waypoint.
  • Page 109 The STAR select page also allows you to review all available STARs for the destina- tion airport and select, delete or change the active STAR. To replace/delete a STAR: 1. Press and rotate until the STAR select page appears. 2. Press twice.

  • Page 110: Section 7: Messages And Unit Settings

    Section 7 Messages and Unit Settings The GNC 300XL’ s M key provides access to system messages and allows you to customize the unit to your own preferences through a settings submenu. Whenever the GNC 300XL needs to alert you to a navigation, communication or system mes- sage, the annunciator light (U) next to the M key will flash.
  • Page 111 The GNC 300XL’ s map page is designed to be a flexible tool that can be custom- tailored to your navigation needs. The map setup page provides access to many of the features and functions that will help you configure the map page to your own preferences.

  • Page 112: Unit Settings

    UNIT SETTINGS SECTION Map Page Setup The automatic zoom feature will automatically adjust the map display through progressively lower scale settings as you approach your destination waypoint. A scale setting of ‘200’ for airports will display airport locations on the map display for all scales from ‘200’...

  • Page 113: Cdi Settings

    ‘off’ to never display. The next page under the settings submenu is the CDI settings page, which allows you to define the scale of the GNC 300XL’ s course deviation indicator. To change the CDI scale: 1. Press and hold , and rotate to select the ‘CDI Settings’...

  • Page 114: Magnetic Variation

    ‘user’ setting will correct information to an entered value. The GNC 300XL’ s arrival alarm can be set to notify the pilot with a message when you have reached a user defined distance to a final destination waypoint (the direct-to waypoint or the last waypoint in a route).

  • Page 115: Battery Saver

    During this time, the GNC 300XL will continue to navigate and track satellites, but will not backlight the display until a key is pressed or a knob is turned.

  • Page 116: Display Settings

    SECTION UNIT SETTINGS Display Settings The display contrast may be set to automatically adjust to varying lighting conditions, using the built-in photocell. Setting the display mode to ‘negative’ will display on-screen characters as light green on a black background. This setting is suitable for night operation.
  • Page 117 The backlight intensity settings control the backlighting level and allow for auto- matic adjustment using the built-in photocell or manual adjustment. To change the backlighting intensity: 1. Press and hold , and rotate to display the ‘Backlight intensity’ page. 2. Press twice to highlight the ‘mode’...

  • Page 118: Units Of Measure

    Default units of measure settings. Units of measure settings with all metric values displayed. The GNC 300XL can be configured to display data in standard or metric units of measure. These apply to: distance, position, speed, altitude, fuel, pressure and temperature.

  • Page 119: Altitude Buffer

    The Special Use Airspace settings page will allow you to turn the controlled/ restricted airspace message alerts on or off. This will not affect the alerts listed on the nearest page. It will simply turn off the warning when you are approaching or near an SUA.

  • Page 120: Map Datums

    By default, your unit calculates positions using the WGS 84 map datum. If you are using charts based on another datum, you must set the GNC 300XL to use the same datum. Using a map datum that does not match the charts you are using can result in significant differences in position information.
  • Page 121 The last page available under the GNC 300XL’ s setup menu is the I/O setup page. The I/O setup page lets you configure the GNC 300XL to input RTCM SC-104 correc- tion data, output to a RS-232 mapping device or a PC (with the optional GARMIN PC Kit or other mapping software) and select the appropriate baud rate.

  • Page 122: Appendix A: Navdata ® And User Data Card Use

    The NavData card supplied with your GNC 300XL can be installed or removed when the GNC 300XL is on or off. Insert the card with the thumb tab at the top, and the beveled corner at the bottom. If the NavData card is not present when the unit is powered on, you will receive a ‘No Jeppesen database’...
  • Page 123 7. To continue with more data transfer types, repeat steps 4, 5 and 6. Otherwise, press E when ‘ok?’ is highlighted. 8. Turn the GNC 300XL off and replace the user data card with a NavData card. The GNC 300XL is now ready for normal operation.

  • Page 124: Appendix B: Installation And Maintenance Of The Gnc 300Xl

    2. Rotate the wrench counterclockwise until it stops to ensure the pawl latch is in the proper position. 3. Insert the GNC 300XL into the aviation rack and rotate the wrench clockwise to secure the unit. To ensure proper connector seating, gently press on the left side of the unit until tightened.

  • Page 125: Appendix C: Simulator

    Appendix C The GNC 300XL’ s simulator mode allows you to plan and practice flights in your home and office using an optional remote battery pack or AC adapter. The simula- tor is not accessible when the GNC 300XL is running off the master avionics switch.
  • Page 126 4. Press to confirm the ‘ok?’ prompt. The position page will now appear, and you may now use most of the GNC 300XL navigation features for practice and planning. You’ll also receive a ‘Do not use for nav’ message to remind you that the simulator mode should never be used for actual navi- gation.

  • Page 127: Appendix D: Gnc 300Xl Messages And Abbreviations

    Appendix D GNC 300XL Messages and Abbreviations The GNC 300XL uses the message page to communicate important information to you. Some messages are advisory in nature, others are warnings that may require your intervention. This appen- dix provides a complete list of GNC 300XL messages and their meanings.
  • Page 128 Configuration reset - The GNC 300XL has detected a failure in its installation configuration memory. Data from the user memory has been used to reset the configu- ration. Check the installation settings for cor- rectness.
  • Page 129 MESSAGES & ABBREVIATIONS No altitude input - The GNC 300XL has failed to receive altitude data from the parallel input. Check the I/O settings and/or the installation. If enough satellites are available for a 3D position fix, no pilot action is required, providing no RAIM warnings are present.
  • Page 130 - The parallel track distance is too large for the active route. Osc needs adjustment - The GNC 300XL has detected excessive drift in its internal crystal oscillator which may result in longer acquisition time. The unit should be taken to an authorized GARMIN service center immediately.
  • Page 131 Remote XFR key stuck - The remote XFR key is stuck in the ‘pressed’ state. Check the installation. ROM failed - The GNC 300XL has detected a failure in its permanent memory. If this message occurs, the unit is unusable and should be taken to an authorized GARMIN service center.
  • Page 132 APPENDIX MESSAGES & ABBREVIATIONS SUA ahead < 10 min - The projected course and current speed will take you inside an SUA within the next 10 minutes. SUA near & ahead - Your position is within two nautical miles of an SUA and your current course will take you inside.
  • Page 133 This section of Appendix D provides a complete list of GNC 300XL abbreviations and their meanings. ALT- Altitude DEG- APP- Approach DEP- APR- Approach DIS- APT- Airport Waypoint DME - ARTCC- Air Route Traffic Control Center DOP- ARV- Arrival DTK-...
  • Page 134 APPENDIX MESSAGES & ABBREVIATIONS ILS- Instrument Landing System MSA- Imperial Gallons INT- Intersection Waypoint MUL- JET A- Jet Fuel - Type A NDB- JET B- Jet Fuel - Type B Kilometers Per Hour Kilometers Knots OBS- Pounds LCL- Local OTH- LEN- Length ºC-...
  • Page 135 RNWY- Runway UNI- URA- RSTCD- Restricted RSV- Reserves USER- RTE- Route USR- Receive Only SAR- Search And Rescue UTC- SEC- Seconds SEQ- Sequence SGL- Signal VNAV- VOR- SID- Standard Instrument Departure WPT- SLCT- Select XFR- SRFC- Surface STAR- Standard Terminal Arrival Route STR- Steer To...

  • Page 136: Appendix E: Specifications

    ** Subject to accuracy degradation to 100m 2DRMS under the US DOD-imposed Selective Availability Program. Whenever the GNC 300XL is connected to the optional remote battery pack and power from the master switch is lost, the unit will revert to battery power.

  • Page 137: Appendix F: Map Datums

    Appendix F Map Datums ADINDAN Ethiopia, Mali, Senegal, DOS 1968 Sudan AFGOOYE Somalia EASTER ISLAND 1967 AIN EL ABD 1970 Bahrain Island, Saudi Arabia EUROPEAN 1950 ANNA 1 ASTRO 1965 Cocos Islands ARC 1950 Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia, Zimbabwe ARC 1960 Kenya, Tanzania EUROPEAN 1979...
  • Page 138 APPENDIX MAP DATUMS LUZON PHILIPPINES Philippines OMAN (excluding Mindanao Isl.) ORD SRV GRT BRITAIN MAHE 1971 Mahe Island MARCO ASTRO Salvage Islands PICO DE LAS NIEVES MASSAWA Eritrea (Ethiopia) PITCAIRN ASTRO 1967 MERCHICH Morocco PORTUGUESE 1973 MIDWAY ASTRO 1961 Midway Island POTSDAM MINNA Nigeria...

  • Page 139: Appendix G: Troubleshooting Q & A

    Appendix G Troubleshooting Q & A The GNC 300XL is a precision navigation instrument that offers a wide array of performance navigation features. The ‘Q & A’ section is designed to answer some of the common questions regarding the GNC 300XL’ s capabilities and operation. If you have a problem operating your unit, go through the troubleshooting section and refer to the reference section noted.
  • Page 140 Can I file slant Romeo ‘/R’ using my GPS? Yes, you may file your flight plan as /R if your GNC 300XL is a certified A1 or A2 installation. If you are flying en route, you may fly /R with an expired database only after you have verified all route waypoints.
  • Page 141 Whenever the GPS SEQ switch is set to the HOLD position, the GNC 300XL allows you to select the desired course to/from a waypoint using the HSI, much like a VOR, and display a to/from flag for the active-to waypoint. In the AUTO posi- tion, the CDI will always display a ‘TO’...
  • Page 142 AUTO position. This allows the the desired course to ‘settle’ prior to the GNC 300XL using it. Once the GPS SEQ switch is set back to the AUTO position, the GNC 300XL will use the HSI course until you have crossed the active-to waypoint and sequenced to the next route waypoint.
  • Page 143 2) A flashing ‘next dtk’ prompt will appear on the GNC 300XL’ s CDI field. Set the HSI to the next dtk value when the waypoint annunciator starts flashing. 3) The To/From indicator on the GPS CDI will flip momentarily to indicate that you have crossed the midpoint of the turn.
  • Page 144 To activate navigation to the first missed approach waypoint after crossing the MAP, press D, then E. The GNC 300XL will provide direct navigation to the holding point. If you do not have direct clearance to the holding point, set the GPS SEQ switch to the HOLD position until you have intercepted the inbound course to the holding point.

  • Page 145: Appendix H: Index

    Appendix H Index Abbreviations ....123-125 Cautions ......ii Accessory list .
  • Page 146 Displaying identifiers ....102 Installation of the GNC 300XL ..114 Displaying airspace boundaries..103 Intersections .
  • Page 147 Squelch ..... . . vii, 35 Removal of the GNC 300XL..114 Renaming user waypoints .
  • Page 148 APPENDIX INDEX Waypoint menu ....36-37 Table of contents ....v-vi Waypoint scanning .
  • Page 150 GARMIN International, Inc., 1200 East 151st Street Olathe, KS 66062 GARMIN (Europe) LTD, Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, UK GARMIN (Asia) Corp., 4th Fl., No. 1, Lane 45, Pao-Hsing Road, Hsin Tien, Taiwan R.O.C.

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