During Replenishment-At-Sea, two hauling winches are used for Replenishment-At-Sea operations, with one
winch used as
the outhaul winch that pulls the trolley and load to the receiving ship and the other winch used as the
inhaul winch
that pulls the trolley back to the delivery ship.
The hauling winch is designed to withstand the breaking strength of the inhaul or outhaul wire rope and
contains a
clutch that slips at 150% of the rated line tension to protect the winch and associated equipment from
severe load
spikes. The drum has a wire rope stowage capacity of 1,200 feet of 5/8-inch or 1/2-inch diameter wire
rope. The hauling
winch is driven by a brushless permanent magnet AC motor, with a fleet angle compensator to spool the
hauling wire rope
onto the drum in level consecutive lays and a band brake to prevent rotation of the drum when the clutch
is disengaged
to test and troubleshoot. A load-holding pawl is used to relieve the electric brake when the winch is
supporting a heavy
load for an extended period.