Antiroll tanks

Antiroll tanks are tanks fitted onto ships in order to improve their response to roll motion. Antiroll tanks are tanks within the vessel fitted with baffles intended to slow the rate of water transfer from the port side of the tank to the starboard side. The tank is designed such that a larger amount of water is trapped on the higher side of the vessel. This is intended to have an effect completely opposite to that of the free surface effect. They can be broadly classified into active and passive antiroll tanks.