The fab shop here on Lake Travis sees stuff like that all the time. Look at the thickness of the floor it was welded to and it becomes pretty easy to understand.
2015 Seaark 1872 MV CC Etec-90
Helix 12 CHIRP SI, HB 1199, MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner