HDPE about 1 1/2 inches thick. Multiple angle cuts

Spacer plate, view 1

spacer plate, second view

Studs sticking up from floor. Hole allowed nut plates to be placed below

Floor prepped for spacer and toilet

Plate is nutted down, several are counterbored to allow studs to be flush to surface. Toilet held down to plate with stainless lag bolts

Toilet mounted on plate

Spacer plate allows toilet to be centered side to side

Centered

This is a High-Boy toilet with a standard residential size seat. In some areas comfort is simply a requirement!

View from above

This allows toilet to be pushed back as far as possible , enabling wider swing of vanity door.

Flush water spigot recessed into bulkhead.

This was made from a full size template that I made up and sent to the fabricator

Custom welded holding tank

View from the back

Fresh water pump and flush water seacock were there. Pump now on bulkhead, sea cock moved adjacent to engine cooling seacock and prop shaft.

Looking into sail locker

Its about 17 gallon, about all that would fit in through the seat/hatch. Floor was cut out, plywood filler made up.

Unused space below sail locker filled with holding tank