Originally Posted by JamesF
The Sidmouth Arctic 24 has a ballast tank as well. About a quarter of a ton, and takes just a few minutes to refill at sea, if I remember rightly. I forget how quickly they can dump it.
We have ballast tanks on the race boats. As mentioned they fill very quickly, ours fill a couple of hundred litres in well under a minute, but that's probably due to our high speeds and the ram effect. They take a few minutes to empty as it just relies on gravity. On the twin hull race boat we have a tank each side and can fill just one if required. Our tanks are baffled so we can run them half full.