The vessel was fitted with a cellular bottom for carrying water ballast when in summer service.

In anything over 12 or 15 knots of true wind the water ballast comes into play.

Sadly, we chose a day of light wind for our sail with Mary, and there was no need to use the water ballast at all.

Clambering to my feet I saw that the ship had released her water ballast.

It has proved easier to manage than water ballast, and more practical.

Up to 80 kg of water ballast can be carried.

We'll need to shift some water ballast before we unmoor.

LS1-d - was the first to have water ballast, following a class rule change.

This was achieved by a system of shifting water ballast.

The 'B' also has tanks to hold water ballast rather than bags.