Explore "David Goes Voyaging" by David Binney Putnam on Textopian. Read with annotations and highlights.
In addition to the nets and trawls and dredges, the ship is equipped with a diving apparatus. It is a helmet or head piece, but not the rest of a suit.
This tall helmet is made of thick brass with a triangle shaped glass window in the front. It fits on the shoulders and there is an air space inside so one can breathe. Then fresh air is pumped in by a hand pump, and whole flocks of bubbles keep rising to the surface coming out from under your arm pits.