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i 68
THE SUBMARINE TORPEDO BOAT
The approach would be with only an occasional exposure
of the periscopes until within torpedo range, when the
attack should be continued with periscopes exposed just
enough to keep a constant bearing on the enemy and all
speed possible maintained until within easy firing distance.
Each submarine having fired its first salvo of torpedoes,
will submerge, reload as quickly as possible and return
to the attack. After exhausting every means of doing the
enemy damage, they withdraw submerged to their base
or lie in wait under water as before until nightfall.
Offensive Operations
The offensive operations of the submarine will devolve
almost entirely upon the large sea-going type of boat.
These operations may be distinctly classified under
three heads; namely, the maintenance of blockades, the
prosecution of naval raids, and participation in the actual
tactical evolutions of the battle fleet.
In the first instance, a group of submarines would be
stationed outside the entrance to the principal ports of
the enemy and would patrol its waters to effectually pre-
vent the exit or the entrance of any ship. It would also
be within the province of the submarine to drag for or
otherwise destroy any mines with which the entrance of
the harbor might be strewn, and having once cleared the
channel, to proceed inside the harbor and destroy what-
ever war vessels or shipping was found there.
To maintain the blockade for any length of time it
would be necessary to have stationed at some known loca-
tion and within easy steaming distance, a tender or other
supply ship, in order that the submarines could work in
relays — a part of them always being on duty while the