AC spring a leak and filled multiple bilges. Fixed leak. Pumped bilges.
Except this one that is INACCESSIBLE.
WHY ON GODS GOOD EARTH, WOULD THIS BOAT BE BUILT IN SUCH A WAY?
Disgusted.
It's a bit annoying. We've got one too, under the bathroom GRP mould.
But if you can stick a camera in, you can stick a hose in too (and pump it out).
There are three including the shower basin. So you probably have 2 more.
Seriously, for what these costs, it seems pretty archaic.
Not a problem, until it is.