From the mast
I will also have the usual marine VHF radio and a high frequency SSB radio. We replaced Wild Eyes' old chart plotter/radar with a new Raymarine model. Vesper Marine has sponsored an AIS Watchmate 'ship radar' that has a seperate radar specificaly for picking up the signals of commercial shipping. It draws very little power so can be 'on watch' all of the time and tells you what type of ship it is, where it is headed and most importantly if you are on a collision course. I'll have two satellitle phones on board as well.