Five 22,000m³liquefied ethylene gas carriers M/T NAVIGATOR MARS, NAVIGATOR VENUS, NAVIGATOR SATURN, NAVIGATOR PLUTO and NAVIGATOR NEPTUNE were constructed by Jiangnan Shipyard (Group) Co., Ltd. and delivered to NAVIGATOR HOLDINGS LTD. respectively in February, September, October, November and December of 2000.

Features

1.The vessel has four "C" type independent bilobed cargo tanks, IMO classified type 2G with maximum pressure of 4.7 bar G, minimum temperature of -104oC for carrying such liquefied gases as ethylene, commercial propane, anhydrous ammonia, propylene, butylene, butadience and vinyl chloride monomer (VCM).

2.Three grades of cargoes in different cargo tanks can be loaded and discharged simultaneously.

3.Two electric-motor-driven deepwell pumps (250m³/h each)are provided for each of the cargo tanks. Two booster pumps (500m³/h each) and one combined type cargo heater/vaporizer are provided on the upper deck to transfer the liquefied gases to the storage tanks on shore.

4.Two deck tanks (125m³ each) are provided for changeover of cargoes.

5.An inert gas generator is provided to produce dry inert gas or dry air. The generator is used for inerting and dehydration of the cargo system as well as the interbarrier spaces during voyage.

6.An independent cargo gas plant control and monitoring system is provided on board. Cargo pumps, reliquefaction plants, ballast pumps, Cargo & ballast valves, etc. are remotely controlled from the main swithboard, and monitored on the CRTs in the cargo control room.

7.The steering gear is of the vane-type with two power units.

Principal Particulars