set off by flarring triggers.
It was originally intended to float the torpedo on the surface of the water, the boat to dive under the vessel to be attacked, towing the torpedo with a line 200 feet after her, one of the triggers to touch the vessel and explode the torpedo, and in the experiments made in the smooth water of Mobile river
on some old flatboats these plans operated successfully, but in rough water the torpedo was continually coming too near the rough boat.
We then rigged a yellow-pine
boom, 22 feet long and tapering; this was attached to the bow, banded and guyed on each side.
A socket on the torpedo secured it to the boom.
Two men experienced in handling the boat, and seven others composed the crew.
The first officer steered and handled the boat forward, and the second attended to the after-tank and pumps and the air supply, all hands turning on the cranks except the first officer.
There was just sufficient room for these two to stand in their places with their heads in the hatchways and take observations through the lights of the combings.