Crewmembers use the ship's A-frame to hoist the dredge and floating collection screen into the water.
A-frame
Image courtesy of Exploring the Submerged New World 2012 Expedition, NOAA-OER. Download larger version (jpg, 6.5 MB).

Crewmembers use the ship's A-frame to hoist the dredge and floating collection screen into the water.

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