I installed an ICOM M-710 RT radio, ICOM AT-130 Wire Tuner, and PTC Pactor modem for long distance voice and data communications.  Since I have my Ham Radio Operators License, I had the radio modified so that it would operate on any frequency between 2 and 30 MHz.

The M710 can be installed so that the main unit is remote from the control head.

Icom M710RT

 

I used the unbonded backstay (stbd on the 350) for the antenna (after adding to Sta-Lok insulators) and used the ICOM AT-130 wire turner and also installed several additional items to reduce electromagnetic interference.   I used the boat bonding system for an RF ground and it worked out great.

ICOM AT-130

 

I found that voice communications using SSB Voice was very poor from the boat so I added Pactor, this worked very well and enabled us to also send and receive email while offshore.

SCS PTC Modem