Slack tanks?

Posted by RRC July 28, 2008 at 17:06In reply to Slack tanks? posted by J. M. Bormann on July 28, 2008 at 14:40:

'The slack tanks of the ship'. My doubt is: "slack tank"

Slack in this case means not completely full. When a ship is in motion, the liquid in a slack tank sloshes around which can cause stability problems as the weight of the liquid is constantly shifting.