I am new to GPS recievers and trying to setup a reciever to a Marine VHF radio for distress calling, ie transmitting global position for if I should ever be in need of the Coast Guard to locate me. The radio communicates, I think via TTL using NMEA0183 v2.0 and higher. Where do I start?
Thanks in advance
Lee :?
Use a suitable MCU development board to capture the GPS data and control the radio. You could have an emergency button interfaced to the MCU that would automatically alert the coastguard service. An MCU with two UARTs would make things easy, but you could use one with a single UART for the radio control and use a software UART for the GPS interface.
Leon
Probably a stupid question, I know nothing about marine and coast guards, but are they able to receive and interprets the data you will send?
Angelo
It would depend on the coastguard service - there is a satellite system for emergency position reporting and there might be simpler systems for small boats using an ordinary marine radio. A speech synthesiser sending Mayday with the GPS location would be suitable for any country, and would alert nearby craft as well.
Leon
diffrntcat:
I am new to GPS recievers and trying to setup a reciever to a Marine VHF radio for distress calling, ie transmitting global position for if I should ever be in need of the Coast Guard to locate me. The radio communicates, I think via TTL using NMEA0183 v2.0 and higher. Where do I start?Thanks in advance
Lee :?
http://www.instructables.com/id/Connect … VHF-radio/
Start here
Are you essentially trying to roll your own AIS transmitter?
In the US and elsewhere, there’s a standard called DSC for GPS position reporting from pleasure craft. Look at the popular radios. They have a GPS input.
Also, there’s AIS class B, the lightweight version of AIS.
Lots of products supporting that now.