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• Glenn Baddeley - GPS - NMEA sentence information :: nmea gps

  Apercu : Status of arrival (entering the arrival circle, or passing the perpendicular of the course line) at the destination waypoint. This sentence is commonly used by autopilots and contains navigation receiver warning flag status, cross-track-error, waypoint arrival status, initial bearing from origin waypoint to the destination, continuous bearing from present position to destination and recommended heading-to-steer to destination waypoint for the active navigation leg of the journey. A sentence this would be the correct thing to do for the data in the same field. A leaves off the last two fields where this distinction is clearly spelled out. This will result in poor performance if the boat is sufficiently off-course that the two bearings are different. This sentence is transmitted when a route is active. Again this information does not change until you are on the next leg of the route. Ture produced by any device or system producing true heading. Recommended minimum navigation information (sent by nav. Cross-track error (nautical miles, 9. Destination waypoint latitude 49 deg. Destination waypoint longitude 123 deg. Listener to determine the exact source of data in the system. Examples might include dual-frequency depthsounding equipment or equipment that integrates data from a number of sources and produces a single output. Water referenced and ground referenced speed data. Only the magnetic heading and magnetic variation is shown in the message. Garmin product model and software version (eg. This sentence shows in feet, regardless of units shown on the display. If the user datum index is specified (96), fields 4 to 8 must contain valid values, otherwise they must be blank. Where a numeric latitude or longitude is given, the two digits immediately to the left of the decimal point are whole minutes, to the right are decimals of minutes, and the remaining digits to the left of the whole minutes are whole degrees.

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