Used for transportation of water and is the simplest and either rectangle or elliptical with/without full/half baffle plates need no calibration. Tankers used for transportation of petroleum products are governed by various acts viz., Explosive act, Weight and Measures Act (subject to calibration annually), general of 12 KL or approx. 9.6 MT CAPACITY. Tanks usually have three or four compartments and their front and rear end and cover are called as Dish ends, where parturition sheets used are called Baffles mainly to meant to reduce the oscillation of liquid. The loading is done by gravity feed method for majority of the goods such as kerosene, petrol, diesel and edible oil. The inlet for tankers carrying these type of goods will be normally on top of every compartment. There are goods loaded only by pressurized flow. These goods will be loaded only through ports filled at the bottom of the tanks, ex., LPG. The outlets) of gravitational fed loads are provided at the bottom of the tanks. The control of outflow will be done by gate valves. A special feature is provided in the petroleum carrier. A special shut of valve arrangement is provided for emergency purposes.