Garmin Streetpilot 3 as a marine gps

Hello everyone,

I have a Garmin Streetpilot 3 and I would like to use it as a gps on my fishing boat, I have read that this is in fact possible but what I am wondering is do I need the bluechart data card?. I will only be using it on larger inland lakes in Ireland and really only want to use it for speed and marking launch points so don't need it to be a full on chart plotter showing depths etc. Hopefully someone can enlighten me on this?

Thanks Steve

 

Thanks a lot nuvi-nebie, was hoping that I would be able to do this without the bluecharts, I would imagine that the maps on the unit will register that I am on a lake and show it as such on the screen? Not just as green land

 

Thanks for the info, the unit should be perfect for what I want then