Why cert. of fittness for gas and chemical tankers only ?

1
FOLLOW

THESE KINDS OF CARGO REQUIRE SPECIAL TYPE OF CONSTRUCTION OF TANKS,VENTING ARRANGEMENTS,LOADING/DISCHARGING ARRANGEMENTS,CONTAINTMENT ARRANGEMENTS,CARING FOR CARGO DURING TRANSIT,SLOSHING EFFECTS ON THE TANKS AND VARIOUS OTHER FACTORS.SINCE EVERY GAS AND CHEMICAL HAVE SPECIAL HAZARDS AND   CHARACTERISTICS,IT IS IN DEED REQUIRED SPECIAL TYPES OF TANKS ARE REQUIRED UNLIKE FOR OIL& WHITE PRODUCTS.HENCE THE C.O.F IS REQUIRED FOR GASES AND CHEMICAL TANKER.