![Alvin pilot Bruce Strickrott guides Dive and Discover photographer Ian Yurdin in the finer points of donning an oxygen mask. This would only be necessary if a serious problem arose with Alvin. The challenge is to form a perfect seal between mask and face, because any leak could endanger the lives of all three people in the submersible.](8.jpg)
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Alvin pilot Bruce Strickrott guides Dive and Discover
photographer Ian Yurdin in the finer points of donning an oxygen mask.
This would only be necessary if a serious problem arose with Alvin. The
challenge is to form a perfect seal between mask and face, because any
leak could endanger the lives of all three people in the submersible.
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