Mess room table and Hydrophone
Note the C-Tube hydrophone head - looks like a valve handle. The mess room clearly doubled as a hydrophone listening room. Under the handle is a graduated dial used to indicate the bearing of the tee (which is under the boat). The head set plugs in on the top of the hand wheel. Presumably this is a shot of the tubes in the "up" position.
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Full size:
600x399
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