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Forum: Marine Electronics

27-02-2015, 07:53

Replies: 26

Making a new GPS compatible with an old boat

Views: 4,472

Posted By bmz

Re: Making a new GPS compatible with an old boat

"One of the great joys of sailing the Chesapeake is the literally hundreds of navigable rivers, creeks and inlets. However, the 6 foot contours on virtually all of them wiggle like a snake. If you...

Forum: Marine Electronics

27-02-2015, 05:12

Replies: 26

Making a new GPS compatible with an old boat

Views: 4,472

Posted By bmz

Re: Making a new GPS compatible with an old boat

Try googling "Garmin 441." That's what I did, and came up with two venders under $400. Also, I paid $350 for mine new about two years ago--I think it was Amazon. Correction: I bought a Garmin 421 new...

Forum: Marine Electronics

25-02-2015, 12:05

Replies: 26

Making a new GPS compatible with an old boat

Views: 4,472

Posted By bmz

Re: Making a new GPS compatible with an old boat

I've heard that before; but it assumes that the bottom contours are all fairly similar--which they aren't. In some places you hit 10 feet a mile out from 6 feet; in other places you hit 10 feet 6...

Forum: Marine Electronics

25-02-2015, 10:33

Replies: 26

Making a new GPS compatible with an old boat

Views: 4,472

Posted By bmz

Re: Making a new GPS compatible with an old boat

A Garmin 441 can be had for under $400 new, less used. I would sail without a depth sounder, but never without a chart plotter like the 441. A depth sounder tells you when you have run aground; a...

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