OWS

Question 1

Discharge must be through OWS and OCM and contain less than __ ppm of oil. The oily mixture is processed through oil filtering equipment that automatically stops when the oil content of the effluent exceeds __ ppm.

Answer 1

15 ppm

Question 2

For at-sea operations, the OCM shall
be set at the __-ppm alarm set point limit.

Answer 2

15-ppm

Question 3

If equipment-operating conditions prevent achieving less than 15-ppm, overboard oil discharge concentrations shall be limited to less than ___-ppm, using the 70-ppm OCM alarm set point.

Answer 3

100-ppm

Question 4

Eductors shall not be used to dewater bilges containing oily waste except in emergency situations or when:

Answer 4

• OWS system has been casualty reported (CASREP)
• No OWSs installed onboard ship,
• Insufficient capacity of the OWHT to handle immediate flow requirements.

Question 5

If eductors must be used, every effort shall be made to discharge beyond __ NM from land and while the ship is underway.

Answer 5

50 NM

Question 6

For in-port operations, the OCM shall always be set at the designated alarm limit for the in-port mode, which is __-ppm.

Answer 6

15-ppm