The Merchant Shipping (Categorisation of Waters) Regulations 1992
These Regulations replace the Merchant Shipping (Smooth and Partially Smooth Waters) Regulations 1987. The smooth waters listed in the Schedule to those Regulations have been divided into three categories, A and B and C, and the partially smooth waters become Category D, and references in other existing Regulations to “smooth and partially smooth waters” become references to Category A, B, C and D waters.