TM 55-1930-208-10
(5) The senior crewman must outline his plan for unloading in advance and insure that vessel and terminal
personnel are thoroughly familiar with the plan and each knows his particular duties.
NOTE
The vessel has no heating coils. It will be the responsibility of the loading terminal to determine prior to
loading the temperature to which a viscous cargo should be heated so it will be sufficiently fluid upon
arrival at the discharge point. Calculations are based on duration of voyage and water temperatures with
an added safety factor.
(6) When carrying a heated viscous cargo, the responsible person at discharge point should be notified as to the
nature of the cargo so that priority can be granted.
(7) Reduce speed of cargo pump while unloading viscous cargo.
(8) Clear cargo lines and hose after unloading a particular product. Open suction valve and operate pump for a
short period of time.
2-12. AFTER UNLOADING.
a. Disconnect cargo hose.
b. Disconnect shore filling connection.
c. Disconnect grounding cable.
d. Empty drip pan into suitable container on shore.
e. Wipe up all spilled liquids.
2-13. CLEANING AND GAS FREEING OF CARGO TANKS.
When it is required that repairs to be made or when under certain conditions, a different grade of cargo is to be loaded. It
is necessary to clean and gas-free the cargo tanks and pump room. Two principles are involved:
emoval of as much cargo residue and scale as possible.
R
entilation of tanks to drive out remaining gases.
V
NOTE
Cleaning requires steam and/or hot water. The vessel requires support from shore or a vessel moored
along side for steam and hot water.
a. Hand cleaning consists of washing down the tank with a stream of hot water. Operate the cargo pump to remove
water and scale from the tank.
2-23
