You guys are dead on about the Hummingbird Depth/Fish Finder. I have one of the same units on my pontoon. It is kind of neat in the shallow waters of the Chesapeake Bay. Not only does it accurately give depth, it also spots the fish by approximate size and location in proximity to the boat via a tribeam transducer (starboard, port, or under the boat). The unit can accommodate a speedometer and surface water temp. Mine is in black and white and is over 10 years old and running great. You can still get service on these units along with various transducers and Thermometers and speed measuring devices.
The Hummingbird VHF radio is a great unit! Advertised as being Very Water Resistant. It requires an external VHF Marine Antenna.
Hope this helps.... Butch
A very WARM place is about to freeze over! This is the first post that I did not have anny spelling errors on the first draft. Hats off to the site's token Applachian American!