Navman has it all. Take a look at :http://www.navman.com/marine/product...nas/index.html
We use the flexibel SS mounting and Ultraglass antenna.
For the Rib we use the steel whip antenna.That will never break.
Remember what Tim said:
Got a Navman now - very nice, easy to use. Only gripe for me is that mine is installed below my eye level - the LCD is a little hard to see at this level - it works better the higher up the console you put it (in relation to your eyes).
Have the same problem. Goes the same for the sound.