I would think that a magellan marine gps would be water proof since you would use it on the water. Your best bet to find out if it is for sure water proof is at this website http://www.magellangps.com/Navionics-Marine-Maps.
The the Garmin GPS 72 is a waterproof marine GPS unit.
Yes, the marine gps chartplotter equipment is water proof. Since marines are basically always working in the water, the product has to be water proof.
The Magellan Marine GPS is fairly priced at $105.36 (new) and $104.16 (used) through Amazon.com http://www.amazon.com/Magellan-Meridian-Marine-Waterproof-Hiking/dp/B00005OLY9
Many online stores that sell electronics (some specializing in GPS systems) sell Magellan Marine GPS. You may want to check sites specializing in marine life technology and aquatics such as http://www.gps-navigators.com/magellan-marine-gps.html.
The most popular brands of GPS systems include Magellan and Garmin. Both offer marine GPS and are available on sites such as Amazon and in stores as well.
Yes, Magellan makes quite a few models of portable GPS systems. In addition to the many products they make for use on roads, they also make marine GPS devices that are to be used for fishing and other activities.
Online you can find intructions for the Magellan GPS by visiting the following webpage where you will find Magellan GPS located just under the "G" heading. http://www.retrevo.com/samples/Magellan-GPS-manuals.html
The best of the two, Magellan and Garmin, would be Magellan. Magellan has the most accurate and consistent GPS. Shoot for Magellan for sure, you will definitely never have trouble with it.
The Roadmate Magellan is very comparable to the Garmin GPS. The Magellan helps you with your daily commute by providing turn by turn directions. Also Magellan offers free map lifetime map updates.
The Jaguar GPS system is voiced by Cara Jones.
GPS
According to the internet, the company that produces the Roadmate GPS device is Magellan GPS Industries. Magellan GPS carries many different products to fit your travel needs.