GPS-óttari 24xd HVS NMEA 0183

The Garmin GPS 24xd HVS antenna stands out for its multi-constellation (GNSS) compatibility and ultra-fast 10 Hz refresh rate. It delivers highly accurate position, heading, and speed data, specifically designed for systems using the NMEA 0183 protocol.

No, this specific model (HVS) is designed only for NMEA 0183 installations. If your boat is equipped with a NMEA 2000 network, you will need to choose the NMEA 2000 version of the GPS 24xd antenna.

The antenna provides a configurable update frequency up to 10 Hz (10 times per second). This ensures extremely smooth tracking on your chartplotter, ideal for fast maneuvers and autopilot precision.

The antenna comes with a supplied cable measuring 9.14 metres (30 feet) in length, providing ample flexibility for installation on most boats.

You have two main mounting options:

A fixed mount on a flat surface.

A mount on a ball joint or a standard 1-inch threaded mount (outer diameter) with 14 threads per inch (not included).

It is recommended to choose a location with an unobstructed view of the sky in all directions.

Yes, it is designed to withstand harsh marine environments. Its high-impact plastic alloy housing is fully sealed and meets IPX6 and IPX7 waterproofing standards, meaning it resists spray and temporary immersion.

The antenna accepts a wide input voltage range from 8 to 32 Vdc. It is therefore fully compatible with 12V or 24V onboard electrical systems while being protected against voltage fluctuations.

Power consumption is very low. Typical input current is 150 mA at 12 Vdc, with a maximum of 200 mA. This effectively preserves your boat's batteries.

Yes. Although this is a Garmin product, its standard NMEA 0183 connectivity (RS-232 and RS-422) makes it compatible with any chartplotter, radar, or VHF accepting NMEA 0183 sentences, regardless of brand.

The antenna is highly versatile and allows adjustment of the NMEA 0183 data transmission speed. It supports speeds of 4800, 9600, 19200, and 38400 bps to match your various navigation equipment.

The antenna has a very short compass-safe distance of just 12.7 mm (0.5 inch). You can install it flexibly without risking interference with your magnetic compass.

The antenna has a compact format. It measures 91.6 mm in diameter and 49.5 mm in height. Its weight is only 201 grams (excluding the cable).

The cable includes several wires for power and data:

Red: Power (+) with 1A fuseBlack: Ground (-)Grey: Transmission Tx/A (Out +)White/Red: Transmission Tx/B (Out -)White: Reception Rx/A (In +)White/Orange: Reception Rx/B (In -)

Advanced configuration (transmission speed, NMEA sentences, update frequency) can be done via specific NMEA commands sent by the chartplotter, or by using the Garmin Sensor Configuration Software on a computer connected via a serial port.

Yes, the antenna has a dedicated PPS (Pulse Per Second) output, identifiable by the purple wire. This enables extremely precise time synchronization for compatible equipment.

Yes, this is an excellent solution. By connecting the antenna’s transmit wires (Tx) to the VHF’s receive wires (Rx) via NMEA 0183 protocol set to 4800 bps, your radio will receive the GPS coordinates required for DSC distress calls.

No, the 24xd HVS antenna is a multi-constellation GNSS receiver. It can simultaneously acquire signals from multiple global satellite systems, ensuring faster acquisition and reliable position maintenance, even in challenging conditions.

The antenna transmits many standard sentences for navigation, including: GPGGA (position data), GPRMC (minimum recommended data), GPVTG (course and speed over ground), and GPGSA/GPGSV (active and in-view satellites).

Yes, it is imperative to install a 1 Amp fuse on the red wire (positive power) to protect the antenna and your boat's electrical circuit in case of overvoltage or short circuit.

The white model of the GPS 24xd HVS antenna is designed to operate in extreme conditions, with an operating temperature range from -30°C to 80°C (-22°F to 176°F).

The main difference lies in the communication protocol. The GPS 24xd HVS antenna uses the NMEA 0183 protocol, while the other model in the GPS 24xd series uses the NMEA 2000 protocol. The choice depends on compatibility with your existing onboard network. If your chartplotter or instruments use NMEA 0183, this model is the correct choice.

A 10 Hz frequency means the antenna updates your position 10 times per second, compared to once per second for a standard 1 Hz frequency. This provides much smoother and more responsive route tracking, which is particularly beneficial for:

Autopilot: corrections are instantaneous, navigation is more precise.High-speed navigation: the displayed position is always up to date.Precise manoeuvres: the route display is more realistic.

Yes, this antenna is designed to be compatible with Garmin chartplotters using the NMEA 0183 protocol. It can also be connected to any other NMEA 0183-compatible device. For connection to a Garmin chartplotter, wiring is straightforward and instructions are provided in the installation manual.

Yes, you can connect up to three NMEA 0183 compatible devices to receive position data from this antenna. This allows you, for example, to simultaneously power your chartplotter, autopilot, and a data repeater.

The antenna comes with a 9.14 m (30 ft) cable featuring 8 wires of gauge 22. Wiring details are provided in the installation manual. Main connections are:

Red wire: Power (with 1 A fuse)Black wire: GroundGrey wire: Tx/A (Output +)White wire: Rx/A (Input +)A complete wiring diagram is provided for connection to a Garmin chartplotter or other NMEA 0183 devices.

The antenna can be mounted on a standard 1-inch diameter mast with a 14 threads-per-inch thread (not supplied). Two methods are possible:

Cable outside the mast: Route the cable through the mast adapter and place it in the slot provided for this purpose.Cable inside the mast: Drill a 19 mm hole in the mast to pass the cable, then screw in the adapter.In both cases, the antenna locks by turning clockwise onto the adapter.

Yes, a below-deck mounting kit is included with the white antenna models. Note: the antenna cannot receive signals through metal. Below-deck mounting is therefore limited to fiberglass surfaces. The kit includes adhesive pads and screws for secure attachment.

The GPS antenna receiver in the 24xd HVS model is a high-sensitivity unit (HVS stands for High Sensitivity). While exact sensitivity values are not published in public specifications, this technology enables it to acquire and maintain satellite lock even in challenging conditions, such as under light tree cover or in urban areas.

For full bidirectional communication (the antenna sends data to the chartplotter and the chartplotter can send commands to the antenna), the wiring is as follows:

Gray wire (Tx/A Out +) to the Rx/A (In +) input of the chartplotter.White/red wire (Tx/B Out -) to the Rx/B (In -) input of the chartplotter.White wire (Rx/A In +) to the Tx/A (Out +) output of the chartplotter.White/orange wire (Rx/B In -) to the Tx/B (Out -) output of the chartplotter.The exact diagram is provided in the installation manual.

If your NMEA 0183 device has only one receive wire, you must connect this wire to the grey wire (Tx/A Out +) of the antenna. The white/red wire (Tx/B Out -) must be left unconnected. This configuration is a standard unidirectional connection.

Yes, it is possible to connect the antenna to a PC via a serial port. The technical manual details the pinout for a connection to an RS-232 serial port. However, the antenna uses CMOS logic levels, so a level converter may be required for a direct connection to a standard serial port. The Garmin Sensor Configuration software can be used to configure the antenna from a PC.

The baud rate can be configured via a special NMEA sentence (PGRMC) or using the Garmin Sensor Configuration software. Supported baud rates are: 4800, 9600, 19200 and 38400 bps. To use the 10 Hz update rate, the baud rate must be set to 38400 bps. For a 1 Hz rate, the default 4800 bps is sufficient.

The operating temperature range depends on the model color:

White model: From -30°C to 80°C (-22°F to 176°F)Black model: From -30°C to 65°C (-22°F to 149°F)Storage temperature is from -40°C to 90°C (-40°F to 194°F) for both models.

The main difference lies in the connection interface. The GPS 24xd HVS NMEA 0183 antenna (reference 010-02316-00) is designed to be integrated into an NMEA 0183 network, using copper wires for data transmission. The NMEA 2000 model, on the other hand, connects directly to an NMEA 2000 network via a standardized connector. The choice depends on your boat's network type. If you already have NMEA 0183 devices, this model is the most suitable.

Yes, this antenna is specifically designed to be compatible with Garmin chartplotters featuring an NMEA 0183 input. The installation manual provides detailed wiring diagrams for a direct connection. It can also be connected to any other NMEA 0183-compatible device, whether Garmin or not.

Yes, this is entirely possible. The GPS antenna 24xd HVS uses the standard NMEA 0183 protocol. It can therefore transmit standard data sentences such as GPRMC (position and speed) and GPVTG (heading and ground speed) to any NMEA 0183-compatible autopilot. You will simply need to follow the wiring instructions in the manual to connect the transmission wires (Tx/A and Tx/B) to the autopilot inputs.

A 10 Hz update rate means the antenna calculates and transmits your position 10 times per second. This provides extremely smooth and responsive tracking, which is particularly beneficial for:

Autopilot: corrections are instantaneous, and the followed route is more accurate.High-speed navigation: the position is continuously refreshed, avoiding lag.Manœuvres: the heading is updated in real time.The antenna can also be configured to operate at 1 Hz if your equipment does not support 10 Hz.

The antenna is compact and lightweight. Its dimensions are 91.6 mm in diameter and 49.5 mm in height. It weighs only 201 grams, making it easy to install on a mast, rail, or flat mount without significantly adding to the structure's weight.

The installation is designed to be straightforward. Several mounting options are available:

Surface mounting: Use the provided mounting bracket and screw it in.Mast mounting: Use the supplied mast adapter (standard 1 inch, 14 threads per inch).Under-deck mounting: Only possible on a fiberglass surface, using the mounting kit provided with the white models.It is crucial to choose a location with an unobstructed view of the sky in all directions for optimal reception. The installation manual provided details each step.

To install the antenna, you will need basic tools:

A drillA 3.2 mm (1/8 inch) drill bit for pilot holesA 19 mm (3/4 inch) drill bit or a 25 mm (1 inch) hole saw for cable routingAn appropriate screwdriver for the supplied screwsA 1.5 mm Allen key for the locking screwMarine sealant (optional for sealing)The installation manual lists all recommended tools.

For optimal reception, the antenna must be placed in a location with an unobstructed view of the sky in all directions. Avoid installing it:

In the shadow of the superstructure, mast, or radome.Near the engine or other sources of electromagnetic interference.Within 1 meter (3 feet) of a VHF antenna.Directly in the beam of a radar.It is recommended to temporarily test the location before drilling the final holes.

Wiring is straightforward and detailed in the manual. Wires are color-coded:

Red: Positive power (with 1A fuse)Black: GroundGrey: Tx/A (Out +) to connect to the chartplotter’s RxWhite/Red: Tx/B (Out -) to connect to the chartplotter’s Rx- (or left unconnected if the chartplotter has only one Rx wire)White: Rx/A (In +) to connect to the chartplotter’s Tx (for bidirectional communication)A connection diagram is provided for error-free installation.

This is a common case. The installation manual specifies the procedure:

Connect the grey wire (Tx/A, Out +) from the antenna to the Rx wire of your device. Leave the white/red wire (Tx/B, Out -) from the antenna unconnected. This simple setup works perfectly for one-way communication from the antenna to your chartplotter or autopilot.

Yes. The GPS 24xd HVS antenna is a standard NMEA 0183 device. It can be connected to any NMEA 0183-compatible equipment regardless of brand: Raymarine, B&G, Simrad, Lowrance, Furuno, etc. Simply follow the wiring for transmit (Tx) and receive (Rx) lines according to your device’s specifications.

The orange 'Accessory on' wire is used to automatically turn the antenna on and off with the dashboard. It must be connected to an 'accessory' signal (often the same wire that powers your chartplotter) or to a switch. Warning: if you do not connect this wire and leave the red power wire permanently connected, the antenna will drain the boat's battery. If your device has no accessory wire, it is essential to connect the orange wire to ground and power the antenna via a switch or the ignition.

Installation is within reach of a competent DIYer. The provided installation manual is highly detailed and includes clear wiring diagrams. Key points are:

Choose a good location with an unobstructed view of the sky.Respect the wire color coding.Properly connect the orange wire to prevent battery discharge.Perform calibration in calm water after installation.If you are not comfortable with electrical wiring, it is recommended to hire a professional installer.