Underwater GPS

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Jeff Pack
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Underwater GPS

Post by Jeff Pack » Wed Dec 18, 2013 8:16 am

http://www.kickstarter.com/projects/188 ... uba-divers

Pretty cool for around here to find mapped wrecks by scooter from shore.
=============================================

- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it

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KneeDeep
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Re: Underwater GPS

Post by KneeDeep » Wed Dec 18, 2013 8:31 am

Seen that one... but then I found this...Wireless
http://www.navimate.com/index.html
The ocean is a lousy teacher. First you get a test, then the lesson.

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Jeff Pack
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Re: Underwater GPS

Post by Jeff Pack » Wed Dec 18, 2013 8:56 am

navimate is vaporware though, been several years.
=============================================

- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it

CCR discussion on Caustic Cocktails.

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Dusty2
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Re: Underwater GPS

Post by Dusty2 » Wed Dec 18, 2013 10:44 am

Not very exciting. You are tethered to the surface with a max depth of 75 fsw. This is something a home DIY enthusiast could accomplish

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Matt S.
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Re: Underwater GPS

Post by Matt S. » Wed Dec 18, 2013 10:55 am

Yeah, not thrilling.

Too bad Navimate looks like it'll never happen. That would be a heck of a cool gadget.

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selkie
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Re: Underwater GPS

Post by selkie » Wed Dec 18, 2013 12:22 pm

The position information is collected at the surface so it is not actually the same as the underwater position. You can do the same by towing a gps on the surface time synced to a camera carried by the diver.
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Dusty2
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Re: Underwater GPS

Post by Dusty2 » Wed Dec 18, 2013 3:11 pm

selkie wrote:The position information is collected at the surface so it is not actually the same as the underwater position. You can do the same by towing a gps on the surface time synced to a camera carried by the diver.


Yep and that is an even more elegant solution but you still need to be tethered to the surface and you still don't get real time locational info to the diver.

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CaptnJack
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Re: Underwater GPS

Post by CaptnJack » Wed Dec 18, 2013 3:34 pm

If the antenna is on a big enough float just pull down to take out the majority of the scope. That gets you into a <10ft circle of precision which nearly as good as GPS + WAAS is in the first place (<3ft 95% of the time). The problem is more the 75ft cable length and watreproofing issues with trying to split on a longer one. Also the diameter of the cable and how much drag it creates in current.
Sounder wrote:Under normal circumstances, I would never tell another man how to shave his balls... but this device should not be kept secret.

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Jeff Pack
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Re: Underwater GPS

Post by Jeff Pack » Wed Dec 18, 2013 3:46 pm

Thats why I was figuring keep about 20ft depth, once on target, surface, drop a shot line, leave unit there. Now would be nice to be able to disconnect unit from antenna, throw in an otterbox, so at worse you only loose antenna. Or I guess something big enough to throw the whole thing in, and bring with you.
=============================================

- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it

CCR discussion on Caustic Cocktails.

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CaptnJack
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Re: Underwater GPS

Post by CaptnJack » Wed Dec 18, 2013 4:16 pm

There aren't that many sites where this is even warranted. Ben and John hit the Bomber from shore via a compass bearing alone. Its hard but not impossible. About the only site where this is even useful right now is the Dauntless off Golden Gardens, if you don't get mowed down by a boat getting there and back. Almost everywhere the dive flag and antenna is more of a liability than a help.

With our local charters struggling and the dubious nature of being a long way from shore in boat infested waters, you are better off investing in a few charters a year or a private boat.
Sounder wrote:Under normal circumstances, I would never tell another man how to shave his balls... but this device should not be kept secret.

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Jeff Pack
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Re: Underwater GPS

Post by Jeff Pack » Wed Dec 18, 2013 4:51 pm

CaptnJack wrote: Almost everywhere the dive flag and antenna is more of a liability than a help..


Sadly oh so true...
=============================================

- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it

CCR discussion on Caustic Cocktails.

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