The ballast needs to be replaced.

30. If the cause of severe list or trim is off-center ballast，counterflooding into empty tanks will ___.

Ballast water can only be（）in cargo tanks in exceptional cases where the particular character of the operation of an oil tanker renders it necessary to carry ballast water in excess of the quantity required，provided that such operation of the oil tanker falls under the category of exceptional cases as established by the Organization.

What are the main parts of submarine remote control vehicle?( ) A: Self propulsion B: Buoyancy control C: Ballast D: Pipeline

Which component in the ignition circuit provides high voltage in the secondary circuit? A: Ballast resistor B: Ignition coil C: Battery D: Ignition distributor

Structural stress levels in a ship are the sum of loading stresses and stresses due to（）. A: environmental loads B: variable loads C: ballast loading D: mooring load

What is the main purpose of dunnage（）. A: To act as ballast for light vessels B: To provide ventilation and drainage for cargo C: To secure the tarpaulins in place D: To support weakened bulkhead

What is the main purpose of dunnage? A: To act as ballast for light vessels B: To provide ventilation and drainage for cargo C: To secure the tarpaulins in place D: To support weakened builkheads

Which of the following equipment is not a traditional anti pollution equipment?_____ A: Ballast water treatment unit B: Exhaust gas boiler C: Oily water separator D: Incinerator