Should the safety key have been withdrawn, great caution must be used.
[Illustration: DRAWING 5.]
Tongs, for going round the upper part of the bolt, to take the place of
the safety key, when once clasped and secured round the bolt, render the
torpedo safe to handle; this could only be done from a boat. With the
safety key in, there is no danger in hooking it inboard again by its own
tow-rope, and hoisting up the buoys at the same time with a grapnel.