Join Surface Interval as we explore the hallways of the Spiegel Grove. A sunken USCG hovercraft transport ship that lays in 100fsw in the Florida Keys.

Both divers in the video are wearing Closed Circuit Rebreathers. The videographer is diving a Optima CCR and the star of the video is wearing an Evolution CCR.

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Comment by Eric Schall on February 24, 2010 at 8:19am
Yes both of us are wearing electronic closed circuit rebreathers. We plug in our desired pp02 into our handsets and the unit monitors our gas mix. When the oxygen sensors detect our pp02 has dropped below our setting it automatically injects 100% oxygen into the breathing loop. The rebreathers have two onboard tanks. For this dive the diluent tank was 21/35 trimix and the other is 100% oxygen.
Comment by Eric Schall on February 23, 2010 at 9:27am
We had 21/35 trimix for onboard diluent. The tank you are seeing in the video with a MOD 20 feet labeled Oxygen is reserved for emergency decompression starting at 20 feet.

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