2-16. HIGH-BANK BRIDGE BAY LAUNCH (continued).
(36) Have boat crew use tag lines to keep bridge bay from swinging while lowering bridge bay.
(37) Position WINCH switch (19) to OUT to lower bridge bay into the water. Release WINCH switch (19)
when bridge bay enters the water (30 in. [0.75 m] water depth desired) and sling slackens to allow
(38) Position HIGH IDLE switch (15) to OFF.
(39) Signal boat crew to approach from downstream.
(40) Have boat crew remove four sling hooks from bow
(41) Position HIGH IDLE switch (15) to ON.
(42) When sling is released, position WINCH switch
(19) to IN. Release WINCH switch (19) when top
of snatch block (22) is about 9 inches (23 cm) from
bottom of extension assembly (21).
(43) Position MAIN FRAME switch (18) to load and stop when large ring of bay sling is about 9 feet (2.7
m) above high bank ground.
(44) Position HIGH IDLE switch (15) to OFF.
Releasing travel latch will cause bridge bay to unfold, resulting in injury or death
to personnel or damage to equipment.
Refer to TM 5-5420-209-12 for bridge bay operations.
(45) Have boat crew release all bridge bay foldlock latches and all travel latches except one.
(46) Have boat crew unfold bridge bay by completing the following procedures:
Insert handle with lanyard into the one engaged bay travel latch.
Keep free end of lanyard aboard boat.
Failure to maintain at least two boat lengths from unfolding bridge bay may result
in injury or death to personnel or damage to equipment.
Move boats clear of area required for unfolding bridge bay.
Pull lanyard to release bridge bay unfolding operation.
Secure bridge bay to boat after unfolding.