The four (4) types of merchant vessels are:

A
Passenger ships—Cargo vessels—Auxiliary vessels—Fishing vessels,
B
Warships—Cargo vessels—Auxiliary vessels—Fishing vessels,
C
Passenger ships—Yachts—Auxiliary vessels—Fishing vessels,
D
Passenger ships—Cargo vessels—Dredgers—Fishing vessels,
E
Passenger ships—Cable layers—Auxiliary vessels—Fishing vessels.