First off: please, don't try doing something like this without the proper training. It would be very easy to badly injure yourself or die. If this looks like fun to you, check out performancefreediving.com and have a look at their course offerings!
2010.05.19 - Kirk, Matt, Ted, Erin, and I went out in the morning and used water scooters to freedive (on breath-hold, not SCUBA) the wreck of the Carrie Lee in Grand Cayman ( northernatlanticdive.com/shipwrecks/carrie_lee/carrie_lee_page-2.htm). Each of us did ~6 dives on the wreck.
The stern of the wreck is shallowest, starting at ~45m (~145') with the bow dipping down to 65-70m (~230'). In the video, I dive for ~3:00, with my deepest point at ~65m.
Everyone on the dive is a well trained freediver with extensive safety training and experience in deep freediving. All of us had previously made multiple, successful freedives unassisted (constant weight) to over 60m (200'), many of these in competition.
These are deep freedives, and we used a specific safety protocol for the dives:
-Wear no weight.
-Dive only as deep and for as long as you can safely abandon the scooter and swim to the surface.
-Mandatory 15 min. surface interval after each dive. This is to avoid DCS (the bends).
-At least one diver on the surface at all times, in case another diver needs assistance (i.e., in case of blackout).
-Always dive down and up the main anchor line, so other divers can see you at and near the end of your dive.
-Oxygen at the surface. Free to use after each dive up to 5 mins, after which at least 5 mins. surface breathing. O2 also there in case of emergency.
-Dive boat at the ready.
The fish which swims up to me in the middle of the video is a "Black Jack," Caranx lugubris.
The grunting sound you hear periodically on the descent is me drawing air from my compressed lungs to equalize my ears, mask, and sinuses (aka reverse packing).
The beeping sounds at depth are my dive computer's alarms. I have them set to notify me at certain depths.
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