Do any of the GPS units have the capability of loading waterway maps along with road maps? Would love to have one that I could use on the bike and the boat.

 

Some of the better unis allow multiable maps to be loaded. You just have to buy the additional map, put on SD card and loadinto the 550

 

What he said! The Zumo 550 can do it all! Have to buy the extra maps though.

 

Will NOT work with the Zumo. I checked with Garmin. I had the very same idea. I was bummed to say the least.

 

Garmin 378 and 478 has both street level mapping and coastal waterway mapping....use it for both boat and vehicles, also waterproof...plus you can subscribe to Nexrad weather and get real time weather on the GPS....about 30.00 a month, but for boaters I can see where it could save your bacon out on the water.

 

I use a Garmin 172 on my boat - it takes BlueChart marine map cards and can also take data from CDs and other sources. But, it would be way too clunky to mount on a bike. But give that the 172 does what you suggested, I bet many of their other units can take marine charts and road maps. Try looking at West Marine and see what they have. Good luck

 

Magellan 2500T is a good cross over GPS with Waterway and topigraphical mapping. Its water resistant as well. I have the 2200T and purchased the cross over feature recently. Its a good unit with some nice fetures. I will say its not a Zumo though, but then again its not even close to the price of the Zumo

Frank

 

Look in to a Garmin 178c I have used this for years on the water when I was a Charter Boat Capt.