85M SUBSEA SUPPORT/ MAINTENANCE VESSEL shall be equipped with two (2) Azimuth thrusters with nozzles and two (2) bow thrusters. It shall be built of steel and engine room is to be located in the middle. and the class notation to be：

BV I +HULL +MACH
Supply vessel- Fire fighting ship 1- water spraying- Oil recovery ship, Special service- LHNS
SP188 SECOND-LINE, Unrestricted navigation, +AUT-UMS +DYNAPOS AM/AT R

now our company as per the relation regulation and rules to design the vessel.