Help

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I have connected the GPS NMEA0183 data from the GPS to the Icom M402 VHF and all is good; however when I connect the same data to the Icom M802 HF, the 802 won't accept it.
It seems to me that the 402 will accept NMEA ver. 2 while the 802 requires NMEA ver. 3 and of course my ancient GPS only outputs NMEA ver 1.5 and ver. 2.
Does anyone know of a simple fix (like new software for the 802) or a way to fool something somewhere?
Supplementary question (perhaps rhetorical), why would Icom design one radio to accept ver. 2 and the other to accept ver. 3 considering the radios are the same age and the GPS data is really only there for the DSC?
Grr....


Or have I missed something basic

?