CHAPTER 2 DESCRIPTION OF OPERATION
Section I. Description and data
2-1 Shore winch installation. To set up the shore discharge system to pump drinking water ashore, an LCM-8 or vessel
with same capability, is positioned across the bow of the ROWPU barge. When the 20-ton capacity shore winch
(weighing 5.5 tons) has been readied for deployment (TM 55-1930-209-14 & P-21), the bow crane lifts it off the barge and
sets it in the LCM-8. When the LCM-8 has run ashore and lowered its ramp, the shore unit uses a forklift to unload the
winch. The winch is then positioned on the beach and stabilized by stakes driven in by an air compressor-powered
jackhammer. The free end of the messenger line, which has been brought ashore, is then fastened to the winch drum.
At the barge, the bitter end of the messenger line and lines from floating buoys are tied to the hose end cap. See TM 55-
1930-209-14 & P-21 for details about installation, operation and maintenance of the shore winch.
2-2 Hose deployment. A supervisor coordinates hose deployment from the hose reel to the shore winch takeup.
Operator uses winch control lever and levelwind control lever to match barge reel winch deployment speed with shore
winch retrieval speed. As the hose is deployed, marker buoys are attached to the hose. These buoys, along with status
lights (nighttime) or status markers on the deckhouse top, warn vessels that an underwater hose is deployed.
2-3 Pumping water to shore. When hose is connected to shore connection, flexible discharge hose deployment is
complete. Drinking water is then pumped ashore until water-making operations at this location are stopped and
discharge hose is retrieved.
2-4 Hose retrieval. Retrieval begins when the flexible hose is disconnected from the water connection ashore and the
PIG catcher is attached to the hose end. The PIG, propelled by compressed air, travels from the barge end of the
discharge hose to the shore, and pushes the water out of the hose to make it easier to retrieve. When this procedure is
complete, the PIG catcher on the end of the discharge hose is replaced with the hose end cap and floating buoys. The
barge winch operator then operates both the hose reel winch control lever and levelwind control lever to rewind the hose
on the winch reel.