TM 5-3990-263-13&P
0009
PREPARATION FOR USE - Continued
OPERATION
CAUTION
Water depth for fording should not exceed 4 feet (1.2 m) or damage to equipment could occur.
NOTE
In case of emergency while the remote control is in use, push the emergency stop switch
to shut down operation of the LHS.
During all vehicle operations, the operator will drive and be responsible for the operation
of the LHS cab control box. The assistant acts as a ground guide and will be responsible
for directing the operator using hand signals, operating the remote control box and winch,
and assisting the operator as needed.
1.
Launch Methods. There are two recommended launch methods: controlled launch and free launch. The
launch method depends on terrain, water conditions, and tactical requirements. The free launch method
requires the least amount of time and is normally used. Water and bank conditions best suited for each type
of launch are described below. For information on the operation of interior bay and ramp bay, refer to TM
5-5420-209-12 or TM 5-5420-278-10.
2.
Launch Conditions. In addition to site survey conditions for normal transporter operations, the following
specific conditions apply for bridge bay launching:
a.
Controlled Launch. (WP 0010) For a controlled launch, shore slope should be uniform, with a slope of
not more than 20 percent. Water velocity should not be greater than 5 feet (1.5 m) per second. In swift
water of about 6 feet (1.8 m) per second, a Y-shaped bridle is attached to the bridge bay. With a 20
percent slope, interior bay requires a water depth of at least 42 inches (1.0 m), with the top of back tire
hub at the water line (whole hub in the water). Ramp bay requires a water depth of at least 50 inches
(1.2 m), with the top of back tire rim at the water line (whole rim in the water). In addition, one travel latch
on bridge bay must remain in the secured position when launching. The boat crew will install a lanyard
to release latch after the bridge bay is in the water, and will open the bridge bay.
b.
Free Launch. (WP 0011) For a free launch, shore slope should be uniform, with a slope of not more than
20 percent. Water velocity should not be greater than 8 feet (2.44 m) per second. With a 20 percent
slope, interior bay requires a water depth of at least 42 inches (106.7 cm), with the top of back tire hub
at the water line (whole hub in the water). Ramp bay requires a water depth of at least 50 inches (127
cm), with the top of back tire rim at the water line (whole rim in the water).
END OF TASK
END OF WORK PACKAGE
0009-2
03/15/2011Rel(1.8)root(opusualwp)wpno(O01066)
