The sea torpedo has the advantage of exploding only when in hugging
contact with the vessel attacked; the levers by which it is exploded are
so placed in relation to the tow-rope, that either the side or top lever
is found invariably to act effectively in forcing down the exploding
bolt at the instant of contact; this has been ascertained by the result
of many experimental trials.
The shape is an irregular figure, which can be best understood by
reference to the drawings (p. 4). The dimensions of exterior case are as
follows:—
ft. in.
⎧ Length 5 0
Large Torpedo ⎨ Breadth 0 6⅛
⎩ Depth 1 8¾
⎧ Length 3 8
Small Torpedo ⎨ Breadth 0 5
⎩ Depth 1 6
[Illustration: (C)