passing ship. The Mk 55 exercise mine is an inert
service mine equipped with exercise components.
REVIEW NUMBER 3 ANSWERS
A1.
The mine case contains or carries all other
components.
A2.
The explosive components of a mine include
the main charge, booster, initiating system,
and auxiliary explosive devices.
A3.
Between 160 and 1,300 pounds of explosives
are used in air-laid mines.
A4.
After a mine is planted, a clock-delay
mechanism prevents the mine from firing until
it has been submerged for a predetermined
time.
A5.
The range of the delay time in planted air-laid
mines is from 8 minutes to 10 days.
A6.
Influence-actuated
firing
mechanisms
in-
clude acoustic, pressure, and magnetic.
A7.
Acoustic mines are detonated by the sound
waves generated by nearby ships' rotating
screws.
A8.
A decrease in the water pressure immediately
surrounding the mine actuates the pressure
mine.
A9.
A change in the earth's magnetic field
actuates the magnetic type of mine.
Mk 62, 63, and 64 Quickstrike Mines
The Mk 62, 63, and 64 (fig. 5-12) mines are
air-laid, all modular, influence-actuated bottom mines.
5-12
Figure 5-12.—Mk 62, 63, and 64 quickstrike mines.
