A head structure is disclosed which includes a novel 
deck, bulkhead and overhead 
coating which prevents 
moisture, especially corrosive sea water, or salt 
atmosphere from reaching the underlying 
deck, bulkhead or overhead even if the surface of the 
coating is damaged or penetrated. The 
coating provides an attractive and highly durable surface which is easily cleaned and resists 
staining or discoloring. The novel coating in connection with the unique head design allows a head to be easily and rapidly cleaned and maintained a daily basis by simple wash-and wipe techniques requiring minimal 
crew involvement time. This permits 
crew members to be able to devote more of their time to education and productive endeavors rather than to maintenance. The head has a 
deck, bulkhead and an overhead, most or all of which are susceptible to 
corrosion in the 
salt water environment. The structure of the head includes one or more lavatory fixtures (especially commodes or basins) mounted on the bulkhead, and a coating adhered to and covering the 
corrosion-susceptible deck, bulkhead or overhead 
metal surface, the coating including a porcelain, 
ceramic or 
terrazzo layer disposed adjacent to but spaced apart from the 
metal surface, a 
moisture-impervious membrane disposed between the porcelain, 
ceramic or 
terrazzo layer and the 
metal surface, and 
adhesive bonding the porcelain, 
ceramic or 
terrazzo layer to the membrane and the membrane to the metal surface.