OVERFLOW CONTROL SYSTEM

Oil, Chemical and Gas Ships must be provided with an OVERFLOW CONTROL SYSTEM in all cargo and slop tanks, independent from the fixed ullage gauges.
In Gas Tankers the operation of the O.C.S. must activate the alarm, stop all cargo pumps and compressors and close the tank filling valves.
The alarm ( O.C.S. ) in all ships must be of audible and visual type in CCR or on main deck in case of ships without cargo control room. In this latter case the position where the O.C.S. panel is located should be continuously manned during the cargo transfer operation so that the alarmed tank can be immediately identify.
For chemical carrier carrying products requiring an IMO 2 type ship, the intended tanks must be fitted with an independent high level alarm ( in addition to the above mentioned O.C.S. ).

 

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