| | Quote: | | | Posted by troydepp | | | |
| The problem I see is running out of air and having someone panic and hold there breath during ascent. Even if it is only 10 or 15 feet that is a huge pressure change. The purpose of Hookah is to have a continuous supply of air. If you do not like wearing a BCD try a Back plate and harness, very simple set up.
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Been using a surface fed air supply for over 7 years with no problems.
Only to depths of 10 to 30 feet though. [one particular wreck site]
Ours is a makeshift DIY jobbie, two bottles linked together with first stages and a couple of lengths of diving hose.
Boat is always positioned over the dive area so minimum amount of hose required.
Depending on the work load, depends how long your air will last.
You will most probably need to come out of the water for a pee long before your air supply runs out.
Besides you will be coming back to the boat on a number of occasions for tools/lift bags/metal detectors etc,
So plenty of opportunity to get your oppo to check air levels.
Obviously this type of diving is for the more experienced so a quick assent through lack of air is not a problem.
I find without the bottles on my back I am able to carry out tasks that would be impossible with tanks, such as investigating through small openings, under large boulders etc.
Once you get use to the air hose, it is a great way to dive.
Posted on: 18-08-2011, 21:48:27
Here’s one of my more attractive recovered artefacts, using the SDDE [surface demand diving equipment].
I would have had no chance of recovery with tanks on my back, as the opening was only just big enough
for the diver to squeeze through.
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Recovered Artifact
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http://www.thunting.com/smf/index.php/topic,7338.msg191559.html#msg191559
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Sir!!... you've lost a lot of blood, but it's OK we've found most of it.
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