NVIC Method

Show NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Maintenance and repair of shipboard machinery and equipment

OICEW-C2 Appropriate basic mechanical knowledge and skills

Maintenance and repair, such as dismantling, adjustment and reassembling of machinery and equipment

The use of appropriate specialized tools and measuring instruments

Condition Behavior Standard

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

the candidate performs valve and diaphragm maintenance on an air-operated diaphragm pump.


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

The candidate:

  1. Correctly plans for the job, using the proper sequence of actions to examine an air operated diaphragm pump;

  2. Takes all necessary precautions to ensure that there is no air pressure or fluid content, prior to pump maintenance;

  3. Follows manufacturer’s instructions to disassemble, clean and examine, replacing any worn parts if necessary, and reassemble all parts of the pump;

  4. Checks the following components for wear or damage and replaces if necessary;

  5. Checks air side, ‘O’ rings and shaft assembly seals and fluid side ball valves, seats and ‘O’ rings for wear or damage and replaces if necessary;

  6. Checks slide valve assembly and performs maintenance as necessary;

  7. Ensures air filter is clean;

  8. Ensures fluid inlet/suction and outlet/discharge ports are clean and not clogged with debris;

  9. Re-starts the pump, observes for proper operation; and

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

MMA Method

In order to satisfy NVIC 17-14 Task 9.1.C , MMA students must:

  • Successfully complete MMA Assessment OICEW-8-2B Reciprocating pump maintenance