Considering the huge variety of locations, handles and fittings, having standardized remote
arrangements seems difficult at best.
This isn't a difficult issue, but it is "fiddly" a bit, depending on your ability to "engineer on the fly". Several manufacture do use cables
or rods for valve manipulation. I'd recommend you entertain small hatches or deck
plates over the areas you have fittings and rig a rod and handle sort of thing.
can offer the luxury of having most of the thru hull
closers in one location. Of course this means climbing down in the bilge
and routing cables, making brackets and fair leads at the fitting, etc. This is a bit more effort, but certainly a "cleaner" method. Personally, I dislike the idea of not being able to see a valve handle perpendicular to the fitting, which is what will happen with long cable runs, but if you are a routine maintenance
guy, then insuring these cables are lubed up and working nicely could relieve some worries.