VESSELS ARE CLASSIFIED INTO 2 TYPES :-
- TYPE “A” VESSELS :- A SHIP THAT IS DESIGNED TO CARRY ONLY LIQUID CARGOES IN BULK AND IN WHICH CARGO TANKS HAVE ONLY SMALL ACCESS OPENINGS, CLOSED BY WATER TIGHT GASKETED COVERS OF STEEL OR EQUIVALENT MATERIAL. THE EXPOSED DECK MUST BE ONE OF HIGH INTEGRITY. IT MUST HAVE A HIGH DEGREE OF SAFETY AGAINST FLOODING, RESULTING FROM THE LOW PERMEABILITY OF LOADED CARGO SPACES AND THE DEGREE OF BULKHEAD SUBDIVISION USUALLY PROVIDED.
- TYPE “B” VESSELS :- ALL SHIPS THAT DONOT FALL UNDER TYPE A VESSELS ARE TYPE B SHIPS. FOR THESE SHIPS IT MAY BE BASED ON :
- THE VERTICAL EXTENT OF DAMAGE IS EQUAL TO THE DEPTH OF THE SHIP.
- THE PENETRATION OF DAMAGE IS NOT MORE THAN 1/5 OF THE BREADTH MOULDED.
- NO MAIN TRANSVERSE BULKHEAD IS DAMAGED.
- SHIP’S KG IS ASSESSED FOR HOMOGENOUS LOADING OF CARGO HOLDS, AND FOR 50% OF THE DESIGNED CAPACITY OF CONSUMABLE FLUIDS AND STORES ET.
A) TYPE (B-60) VESSEL : THE VESSEL MUST HAVE AN LBP OF BETWEEN 100 AND 150 METER. IT MUST SURVIVE THE FLOODING OF ANY SINGLE COMPARTMENT (EXCLUDING THE MACHINERY SPACE). IF GREATER THAN 150 M LBP, THE MACHINERY SPACE MUST BE CONSIDERED AS A FLOODING COMPARTMENT. A TYPICAL TYPE OF THIS IS BULK CARRIER.
B) TYPE (B-100) VESSEL : THE VESSEL MUST HAVE LBP OF BETWEEN 100 AND 150 METER. IT MUST SURVIVE THE FLOODING OF ANY TWO ADJACENT FORE AND AFT COMPARTMENT(EXCLUDING THE MACHINERY SPACE). IF GREATER THAN 150 METER LBP, THE MACHINERY SPACE MUST BE CONSIDERED AS A FLOODABLE COMPARTMENT, SUCH A VESSEL MAY BE CLASSIFIED AS A TYPE “A” VESSEL.