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 TM 55-1925-273-10-1
OPERATOR'S MANUAL
INLAND AND COASTAL LARGE TUG (LT)
OPERATION UNDER USUAL CONDITIONS
INTERCOMMUNICATION AND SOUND POWERED TELEPHONE SYSTEMS
INITIAL SETUP:
Personnel Required:
One Crewmember
SOUND POWERED TELEPHONE SYSTEM
NOTE
There are four models of sound powered telephones used on the Large Tug (LT), and all operate
with the same overall method of operation as described in this work package.
1.
To answer a call, pick up the handset (figure 1, item 1), press and hold the pushbutton (figure 1, item 2), and talk like it
is a regular telephone.
2.
To place a call:
a.
Turn the selector knob (figure 1, item 3) to the desired station number.
b.
Turn the magneto handle (figure 1, item 4) clockwise three to four times to signal the station being called.
NOTE
The handset pushbutton (figure 1, item 2) must be pressed to talk or listen.
c.
Press the handset pushbutton (figure 1, item 2) to communicate with the station you called.
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Figure 1. Typical Sound Powered Handset
0083 00-1
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