Sooner or later, we need to do some repairs and painting under the waterline of the barge.
(The barge is the illutron ship - www.illutron.dk )
Getting her in a drydock is great, but very expensive. - So, why not try an old idea (invented in 1862 by Edward S. Renwick to repair the Great Eastern.
Rough sketch of how it would be mounted on the illutron barge: