Orca II in Jaws

For the film "Jaws," the producers opted for a motorless fibreglass boat that could "sink on command" and then resurface. The Orca II was a wooden boat built after the model of the actual wooden Orca used as Quinn's shark-hunting vessel in the last scene of the film. For Orca II to be filled and sunk, pneumatic tubes tipped barrels that were mounted under it.