OICEW Task 5.2.C

De-ballast a tank

MMA Method

In order to satisfy NVIC 17-14 Task 5.2.C , MMA students must:

NVIC Method

See NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Operate fuel, lubrication, ballast and other pumping systems and associated control systems

OICEW-A5.2 Operation of pumping systems:

Operation of bilge, ballast and cargo pumping systems
Condition Behavior Standard

On a vessel of at least 1,000 HP, on a simulator, or in a laboratory,

the candidate plans for and conducts a deballasting of double-bottom or wing tanks.


All The assessment is required for all OICEW endorsements regardless of any limitations for propulsion mode and/or vessel equipment.

The candidate performs the following actions, and describes them as they are performed:

  1. Lines up the ballast pump suction manifold and/or suction piping to take a suction on the ballast-tank fill and drain manifold;

  2. Lines up the ballast-pump discharge manifold to direct flow of sea water overboard;

  3. Lines up the ballast-tank fill and drain manifold to drain those ballast tanks as directed;

  4. Starts the ballast pump;

  5. Stops the ballast pump when tanks are emptied;

  6. Restores the ballast system piping to normal; and

  7. Takes proper action to prevent safety and pollution violations.