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All Things Diving
A website dedicated to all things related to diving.

All Things Diving
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Rescue and salvage of the Squalus submarine in 1939

The first operational dive using helium-oxygen or Heliox

On May 27, 1939, Owen P. Churchill made the first operational helium-oxygen or Heliox dive. The rescue and salvage of the submarine Squalus has been one of the greatest achievement in diving. 33 people were evacuated from a depth of 242 ft. The procedures were theorized and tested on animals almost two decades before by Joel Henry Hildebrand with R. R. Sayers and W. P. Yant, but never attempted.

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Pro Tips

Rinse inside the console boot

Most divers have their SPG in a boot along with some other instruments. Depth gauge, compass, dive computers. Once in a while, the SPG should be popped out and its connection where the hose swivel is should be rinsed as well …
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Set up your gear early

To set up or assemble your gear at the beginning of a trip out has many advantages. It allows you to familiarize with it if you have not been diving for a while. Or gives more time to find a …
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Learn to orally inflate your BC

Everyone can press a button but not everyone is comfortable to inflate a buoyancy compensator orally in the water. It is a good skill to have and it cannot hurt to really master it. It is taught in all entry …
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