TM 5-5420-278-10
0019 00
0019 00-8
c. For a high-bank launch of IRB bays, the following requirements must be met:
(1) The bank should slope no more than 5%. If the bank slope is greater
than 5%, the front end of the launching CBT must be anchored.
(2) The water velocity should not be greater than 5 ft (1.5 m) per second.
(3) The bank height should be between 528 ft (1.58.5 m), and its side
must be near vertical for clearance during launch.
(4) The minimum water depth is 2 ft 8 in. (0.8 m) for IRB-R and 1 ft 10 in.
(0.5 m) for IRB-I.
(5) There must be sufficient room to unload the bay to the ground parallel
to the shore bank and maneuver the CBT perpendicular to the bay for
the high-bank launch.
SITE REQUIREMENTS AND LAYOUTS (Contd)
BANK HEIGHT
528 FT (1.58.5 m)
UNLOADING BAY TO GROUND
PARALLEL TO BANK
HIGH-BANK LAUNCH
WATER DEPTH
2 FT 8 IN. (0.8 M) MINIMUM, IRB-R
1 FT 10 IN. (0.5 M) MINIMUM, IRB -I
BANK HEIGHT
528 FT (1.58.5 M)
WATER DEPTH
2 FT 8 IN. (0.8 M) MINIMUM, IRB-R
1 FT 10 IN. (0.5 M) MINIMUM, IRB-I
d. For deployment by helicopter, the following requirement must be met. A
water depth of at least 30 in. (76.2 cm) is recommended.