Fuel, fresh water, grey and black water, hydraulics and fire systems, routed so the next engineer can actually get a spanner on them.
Tanks, transfer, filtration and polishing, built and pressure-tested before commissioning.
Fresh water, grey and black systems renewed to current regulation, with access designed in.
Steering, stabiliser, passerelle and crane circuits, hosed and hard-piped where each belongs.
Pumps, manifolds and suppression, tested wet and signed off with the class surveyor.