Monark,
First, good luck. But, there are water ballast tanks for things such as wakeboarding, etc. If these could actually be attached to the railing, there is a
pump made for them that fills each 500 lb. or so tank in under five minutes. Now, how easy this would be to do underway during a race when you''re shorthanded anyway, I don''t know. But perhaps there is such a
pump for the tanks you have in mind.
Best of Luck,
Mary