Simrad RS20S User Manual
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Simrad RS20S User Manual

Fixed mount vhf
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RS20S
Fixed Mount VHF
User Guide
ENGLISH

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Questions and answers

David Jew
March 27, 2025

I have the Simrad RS40 and trying to reset it after buying the boat used and enter my new MMSI myself. Done the DSC setup, nada, entered code 2137, nada, entered new MMSI numbers nada, got to factory reset and says Enter, nada, pressed the big Enter button nada

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1 comments:
Mr. Anderson
May 14, 2025

You cannot reset the Simrad RS40 or enter a new MMSI number yourself once it has been entered. If the MMSI number is incorrect or needs to be changed, you must take the radio to a Simrad dealer. Only authorized service can reset or change the MMSI number.

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Summary of Contents for Simrad RS20S

  • Page 1 RS20S Fixed Mount VHF User Guide ENGLISH...

  • Page 2: General Information

    General Information Your RS20S provides the following useful features: • Prominent channel display • Built-in GPS receiver and antenna • With external GPS antenna connection • Adjustable contrast settings for the LCD • Adjustable keypad backlighting for easy night-time use •...

  • Page 3: How To Display And Navigate Menus

    To step backwards, press the MENU button. Press X to cancel entry and return to previous menu. LCD symbols and meanings When the RS20S starts up it momentarily displays the brand, model, region, software version, and MMSI. General Information |...
  • Page 4 Weather channel bank active replaces channel bank icon temporarily (USA/CAN only) Channel is saved in the MY CHANNELS list Track your Buddy feature is active TRI watch or DUAL scan is active GPS simulator is active General Information | RS20S User Guide...
  • Page 5 Time (derived from GPS) - UTC offset is applied Latitude/Longitude Squelch level indicator Channel number (2 or 4 digits) The USA channel bank is active DSC functionality is enabled, but autoswitch is off Weather alert function is enabled General Information | RS20S User Guide...

  • Page 6: Key Functions

    Long press to open the MENU SELECT page. Power / Backlight Short Press to adjust backlight level sequentally. Repeated short press of the power button will step through large backlight adjustments. The Channel knob can be used to make finer adjustments. General Information | RS20S User Guide...
  • Page 7 ‘watched’ are the current channel the ‘watch’ channel, and the priority channel (the distress channel, CH16 for most countries). If the radio is set to ‘Country: USA’, two priority channels are watched - Channel 9 and Channel 16. General Information | RS20S User Guide...
  • Page 8 Holding either key will, after a short delay, step rapidly through the channels. PTT (handset mic only) Push-to-talk button. Press button to transmit. Only depress for duration of message to be broadcast. Radio can’t receive while it is transmitting. General Information | RS20S User Guide...

  • Page 9: The Radio Menus

    This menu is for choosing a scan mode to enable, as well as selection of the channels scanned per the MY CHANNELS list. ¼ Note: Scanning is not available if ATIS mode is turned on. All scan Scans all channels cyclically. The radio menus | RS20S User Guide...

  • Page 10: Edit My Channels

    Select this to watch the current channel and the priority channel (Channel 16). TRI watch Select this to watch the current channel, the user selected ‘watch’ channel, and the priority channel (Channel 16). The radio menus | RS20S User Guide...

  • Page 11: Time Display

    Press MENU SELECT button to activate night mode (inverts display). Network group Set this value to the same as other Simrad devices on NMEA 2000 in order to control backlight levels simultaneously. To keep backlight control inpedenent, set to a value not used elsewhere.

  • Page 12: Radio Setup

    It can be a maximum of 12 characters long. Key beep Select to allow adjustment of key beep volume. Volume can be set from 00 - 10 (where 00 is off, and 10 is loudest). The radio menus | RS20S User Guide...
  • Page 13 Choose BUILT-IN to use the internal GPS system. You then have a choice of using the INTERNAL GPS antenna built into the radio, or an optional EXTERNAL GPS antenna connected to the radio external GPS antenna SMA port. The radio menus | RS20S User Guide...

  • Page 14: Menu Timeout

    Select between NONE, 5 MINS, 10 MINS, and 15 MINS. (default is 10 MINS). ¼ Note: A different timeout is used when the radio is left in a DSC call. See “DSC timeout” on page 23 The radio menus | RS20S User Guide...

  • Page 15: Dsc Setup

    DO NOT enter a random ‘made up’ number. ¼ Note: Contact a Simrad dealer if you need to change your ATIS ID after initial input. Individual acknowledge (“INDIVIDUAL ACK”) The radio can be configured to automatically acknowledge an incoming ‘individual’...
  • Page 16 The radio can be configured to automatically acknowledge an incoming test call, or require manual intervention: MANUAL Operator must manually choose to send acknowledgement, or cancel. AUTO The DSC test call is automatically acknowledged after a 10 second delay. The radio menus | RS20S User Guide...
  • Page 17 Select between ON and OFF. WX alert (US/CAN only) The WX alert is a warning to the user that a special weather station alert has been received. It comprises of an audible alarm and visual alarm; The radio menus | RS20S User Guide...
  • Page 18 It is not possible to alter distress call alert settings Reset Use this setting to return every setting to the factory defaults except all MMSI settings, entries in your buddy list and any customized channel names. The radio menus | RS20S User Guide...

  • Page 19: Dsc Call Menu

    The nature of the distress call must be selected from the list of options - this will be displayed on other radios receiving the call. After the Distress Call is sent, the radio waits for an acknowledg- ment. DSC call menu | RS20S User Guide...
  • Page 20 GCID, or by selecting a group from the RECENT list. When the SEND TO page is displayed, turn the channel knob to select the channel to use for voice communication. DSC call menu | RS20S User Guide...

  • Page 21: All Ships

    CONTACTS, by entering in a new vessel’s MMSI (MANUAL), or by selecting a vessel in the RECENT list. Comms channel selection is not possible. MMSI/GPS Shows entered MMSI number and GPS fix information. DSC call menu | RS20S User Guide...

  • Page 22: Track Buddy

    If tracking is already taking place, the START TRACKING text is replaced with STOP TRACKING. Interval The frequency that ‘buddys’ are polled with position requests can be adjusted, varying between 5 to 60 minutes. DSC call menu | RS20S User Guide...
  • Page 23 ¼ Note: Adding a group to this list will in turn make the radio respond to a group call made from any other radio with the same group number in it’s memory. DSC call menu | RS20S User Guide...
  • Page 24 The available shortcut channels can be changed at any time using EDIT MY CHANNELS. ¼ Note: Channels on this list are also used in some SCAN options. Access to edit the MY CHANNELS list is also available from the SCAN menu. My channels | RS20S User Guide...
  • Page 25 It’s purpose is solely for displaying radio information in one easy to access location. It provides detail on the MMSI number, GPS data status, and Vessel Callsign (if entered). Once the desired shortcuts have been selected, they are accessible directly from the Shortcuts page: Shortcuts | RS20S User Guide...

  • Page 26: Installation

    Installation This Simrad DSC VHF radio is designed to generate a digital maritime distress call to facilitate search and rescue. To be effective as a safety device, this radio must be used only within the geographic range of a shore-based VHF marine Channel 70 distress and safety watch system.

  • Page 27: Installation Options

    +/-20 deg from the front of the display. ¼ Note: If unsure, temporarily power up the radio and ensure the loca- tion is suitable. 20° 20° 20° 20° Installation | RS20S User Guide...

  • Page 28: Bracket Installation

    Insert the two mounting knobs through the holes and tighten them sufficiently to hold the radio at the desired viewing angle. Fit the bezel trim to the front of the radio to cover dash mount screw holes. Installation | RS20S User Guide...

  • Page 29: Flush Installation

    Use a 2.5 mm (3/32” ) drill bit to drill the 2 pilot holes. Using a Phillips screwdriver, secure the Mic mount using the supplied 3.5x20 mm selftapping screws to the mounting location. Hang the fist mic on the mount. Installation | RS20S User Guide...
  • Page 30 Install the gasket by firstly threading the attached cable through the centre of the gasket. • Screw the GPS antenna to the mounting surface. ¼ Note: Ensure the surface mounting area is clean with no dirt, old paint or debris. Installation | RS20S User Guide...
  • Page 31 This may damage the transmitter. The connectors are on the rear of the base unit, as follows: Battery - (black): connect to vessel’s negative busbar Battery + (red): connect to vessel’s 12 V DC, via a switch panel or Installation | RS20S User Guide...

  • Page 32: First Startup Configuration

    Some steps must be completed; some are optional and can be completed later. The steps are outlined below for reference: Select the region and country the radio will be operated in. Installation | RS20S User Guide...
  • Page 33 ¼ Note: MMSI entry can only be done once. Changing the MMSI requires radio be returned to a Simrad dealer. For some EU region radios only: Enter the ATIS ID number. Re-enter number to confirm correct entry.
  • Page 34 MMSI. • If you need to have the MMSI in the radio changed, the radio must be taken back to your Simrad dealer. ATIS Automatic Transmitter Identification System (ATIS) is required for vessels making VHF transmissions whilst on the inland waterways of the Regional Arrangement Concerning the Radiotelephone Service on Inland Waterways (RAINWAT) signatory countries.
  • Page 35 Ofcom when you add one or more pieces of ATIS equipment to your Ship Radio Licence. If you don’t have a user MMSI or ATIS ID, contact the appropriate licensing authority in your country. I Installation | RS20S User Guide...

  • Page 36: Specifications

    42 mm x 34 mm (1.65” x 1.3”), FSTN Contrast control: Backlight control: VHF antenna connector: SO-239 (50 ohm) GPS antenna connector: SMA (female) Waterproof: IPx7 Dimensions: W=166.7 mm (6.56”) x H=89.2 mm (3.5”) x D=161.4 mm (6.35”) - without bracket Specifications | RS20S User Guide...
  • Page 37 DSC TX deviation at 1.3K: 2.6 ± 0.26 KHz DSC TX deviation at 2.1K: 4.2 ± 0.42 KHz ATIS TX deviation at 1.3 KHz: 1.3 ± 0.13 KHz ATIS TX deviation at 2.1 KHz: 2.1 ± 0.21 KHz Specifications | RS20S User Guide...
  • Page 38 C/A code Number of channels: 72 channels Horizontal accuracy: <10 m Position fixing time: Warm start: 30s, Cold start: 90s Position update interval: 1 second typical ¼ Note: Specifications are subject to change without notice. Specifications | RS20S User Guide...

  • Page 39: Eu And International Channel Chart

    Recommendation ITU-R M.1084-5 Annex 4, Tables 1 and 3. The Table below also describes the harmonized channels where the digital technologies defined in the most recent version of Recommendation ITU-R M.1842 could be deployed. (WRC- Channel charts | RS20S User Guide...
  • Page 40 TELEPHONE 156.025 160.625 TELEPHONE 156.075 160.675 PORT OPS 156.125 160.725 PORT OPS 156.175 160.775 PORT OPS 156.225 160.825 TELEPHONE 156.275 160.875 PORT OPS 156.325 160.925 PORT OPS 156.375 156.375 BRIDGE COM 156.425 156.425 SHIP-SHIP Channel charts | RS20S User Guide...
  • Page 41 Nos. 51.69, 51.73, 51.74, 51.75, 51.76, 51.77 and 51.78. However, the use of the channels which are shared with Channel charts | RS20S User Guide...
  • Page 42 (channels 10, 67, 73) may also be used, if so required, by the individual administrations concerned, for communication between ship stations, aircraft stations and participating land stations engaged in coordinated search and rescue and anti- Channel charts | RS20S User Guide...
  • Page 43 Additionally, AIS 1 and AIS 2 may be used by the mobile-satellite service (Earth-to-space) for the reception of AIS transmissions from ships. (WRC-07) q) When using these channels (10 and 11), all precautions should be taken to avoid harmful interference to channel70. (WRC-07) Channel charts | RS20S User Guide...
  • Page 44 Recommendation ITU-R M.2092, subject to coordination with affected administrations. (WRC-15) x) From 1 January 2017, in Angola, Botswana, Lesotho, Madagascar, Malawi, Mauritius, Mozambique, Namibia, Democratic Republic of the Congo, Seychelles, South Africa, Swaziland, Tanzania, Zambia Channel charts | RS20S User Guide...
  • Page 45 Article 5. From 1 January 2017, the frequency bands 157.025-157.100 MHz and 161.625-161.700 MHz (corresponding to channels: 80, 21, 81 and 22) are identified for utilization of the digital systems described Channel charts | RS20S User Guide...
  • Page 46 From 1 January 2019, channels 1027, 1028, 87 and 88 are used as single-frequency analogue channels for port operation and ship movement. (WRC-15) Source: ITU Radio Regulations (2016); reproduced with permission from ITU Channel charts | RS20S User Guide...

  • Page 47: Usa Channel Chart

    PORT OPS 156.825 156.825 PORT OPS 156.875 156.875 PORT OPS 157.225 161.825 TELEPHONE 157.275 161.875 TELEPHONE 157.325 161.925 TELEPHONE 157.375 157.375 TELEPHONE 157.425 157.425 INTER-SHIP 1001 156.050 156.050 PORT OPS/VTS 1005 156.250 156.250 PORT OPS/VTS Channel charts | RS20S User Guide...
  • Page 48 NOAA WX1 RX ONLY 162.400 NOAA WX2 RX ONLY 162.475 NOAA WX3 RX ONLY 162.425 NOAA WX4 RX ONLY 162.450 NOAA WX5 RX ONLY 162.500 NOAA WX6 RX ONLY 162.525 NOAA WX7 RX ONLY Channel charts | RS20S User Guide...

  • Page 49: Canada Channel Chart

    161.800 TELEPHONE 157.250 161.850 TELEPHONE 157.300 161.900 TELEPHONE 157.350 161.950 TELEPHONE 157.400 162.000 TELEPHONE 156.025 160.625 TELEPHONE 156.075 160.675 CANADIAN CG 156.125 160.725 CANADIAN CG 156.175 160.775 TELEPHONE 156.225 160.825 TELEPHONE 156.275 160.875 TELEPHONE Channel charts | RS20S User Guide...
  • Page 50 PORT OPS 1025 157.250 157.250 PORT OPS 1026 157.300 157.300 PORT OPS 1027 157.350 157.350 CANADIAN CG 1061 156.075 156.075 CANADIAN CG 1062 156.125 156.125 CANADIAN CG 1063 156.175 156.175 TELEPHONE 1064 156.225 156.225 RESTRICTED Channel charts | RS20S User Guide...
  • Page 51 RX ONLY Canada weather channels Transmitting frequencies (MHz) Channel From ship From coast S/D/R Channel name Restrictions designator stations stations 162.550 CANADA WX Rx only 162.400 CANADA WX Rx only 162.475 CANADA WX Rx only Channel charts | RS20S User Guide...

  • Page 52: Dimensional Drawings

    Dimensional drawings 60 mm (2.36”) 165.9 mm (6.53”) 161.4 mm (6.35”) Dimensional drawings | RS20S User Guide...

  • Page 53: Nmea 2000 Compliant Pgn List

    129044 Datum 129799 Radio Frequency/Mode/Power 129808 DSC Call Information 129540 GNSS Sats in View *) Only if GPS source = INTERNAL NMEA 2000 compliant PGN list | RS20S User Guide Learn more about marine electronics and navigation on our website.

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