Non-capsizable lifeboat built in America.
American non-capsizable lifeboat.
Location of events unknown / unclear.
Test of the boat: men use rope to turn over the boat in the water; then one man gives it a little poke with a pole and it turns over right side up.
Then a shot of the boat moving along quickly towards right; oars sticking out of holes and all turning regularly together; there is a man in the back of the boat.