What GPS?

[jvdk01]

I just bought a Magellan Explorist 500 LE from Costco.com (cost was just under $200 with tax). It has a color display and comes bundled with the topo software. It takes regular SD memory cards to expand the internal memory. It can use a Li-ion battery or an adapter that uses 3 aaa batteries. The battery life is very short with the aaa batteries, so I will get a Li-ion battery shortly. I don't have any prior experience with GPS units, but I am very happy with this one so far.

 

[Spectre]

Then, pop the unit in the housing and try to go back to the points. Record the differences. This will be errors generated by having the unit inside a housing. The housing will shield your unit from the satellite signals.

Perhaps I'll try again, for those lacking in common sense.

1. Put GPS in waterproof canister
2. Do dive to depths within canister rating [600']
3. Surface in sink of unknown location
4. open canister
5. turn on
6. mark waypoint
7. return to canister
8. finish dive
9. navigate to sink
10. drink beer and discuss being able to start dive 3000' further in.

Oops, I forgot to specify "don cave diving gear", so feel free to point out that 3000' feet is a long way to freedive.

 

[aHeavyD]

I had garmins stuff and love it. I had the garmin 5 and the street pilot 3, I also had the downloadable maps.
I gust bought the Gamin Nuvi 660 and wow is super fast and small. I has a SD card slot for up to 2 gig extras.
Best price I've seen on GPS is GPSNOW.com, I've bought from them twice and had not problems http://www.gpsnow.com/
info on the Nuvi 660
http://www.gpsnow.com/garmin_nuvi_660.htm#info

 

[Fastmarc]

I got the Lowrance iFinder H2O for that very reason and I am pleased with it.
It's water resistant to IPX-2 standards and even floats. I have surfaced from dives several times and have them hand it to me in the water to save a waypoint. So far, no problems.
I also have it loaded with the Navionics chart for my area.

 

[Charlie59]

A GPS is for those who don't realize the true beauty of being lost.

 

[Fastmarc]

Or for those who having be lost, want to find the same spot to be lost again.
(this sounded better in my head)

 

[Charlie59]

The echo effect will make things sound better.

 

[PaulSmithTek]

Technically speaking GPS can be used underwater. And new technology is proving even more positive.

 

[Charlie59]

Sure, but every time I drive into the bay my car stalls.

 

[PaulSmithTek]

LOL..No more radio waves. Seriously though it is possible. Here is a link proving it can be done.
www.chinadaily.com.cn/en/doc/2004-01/11/content_297818.htm