Using an approved simulator, in the laboratory, or aboard ship and given access to an air compressor.

Performance requirement

Behavior Standard
The student will: During assessment, the student shall, at a minimum:

Check unit for readiness to start

Inspect mechanical condition of equipment

Observe sufficient lubricating oil

Blow down receiver and moisture traps

On water cooled units, verify coolant flow

Line-up compressor

Verify compressor discharge valve is open

Start compressor

press start button

verify control set to automatic

Monitor operation of air compressor

Verify operation of unloader

Verify operation of cut-in and cut-out switches

Secure the air compressor

Press the stop button

Leave compressor lined up to start


Assessed in EN‑2111 Auxiliary Machinery II.


  1. Table A-III/1 OICEW-A4.1
  2. NVIC 17-14 Task 4.1.A

Lab Manual

Auxiliary Machinery II Laboratory Manual

See the Assessment Guidelines for additional specifications of behavior and standards.