World's Largest Scale Offshore Support Vessels

“K” Line operates two types of vessels: platform supply vessels (PSVs) and anchor handling tug supply (AHTS) vessels. PSVs are known as the "Sea trucks," as they are used primarily to transport materials and fuel to oil and gas field development rigs. When drilling rigs are transported to different locations, AHTS vessels are used to reel up the anchor from the seabed, tow rigs and support seabed pipeline laying.

Our PSVs have the largest capacity in the world, with deadweight capacity of 5,100 tons and deck space of 1,100 square meters, providing about 1.5 times the capacity of standard type PSVs. Demand for this type of large PSV is rising in conjunction with the shift to more distant offshore oil and gas field development.

Though our AHTS vessels are 1/3 (total length 95 meters/ total width 24 meters) of the size of VLCC, their BHP are equivalent (34,000 BHP). They use this power to tow the rigs that drill in oil and gas fields and to lift rig's anchors. Our AHTS vessels have 390 tons of traction (Bollard Pull) which is one of the most powerful AHTS in the world.

The AHTS vessels are equipped with the most advanced equipment including remotely-operated vehicles that are used to perform work on the seabed, such as installation, repair, and inspection of oil field development equipment and 250-ton A frames that can raise and lower large seabed equipment.

Both PSV and AHTS are equipped with dynamic positioning systems (DPS) that use the vessel's own propulsion equipment to maintain a fixed position. They also adopted double-hulled fuel tanks and ballast water processing-hulled equipment prior to the coming into effort of the “Convention for the Control and Management of Ships' Ballast Water and Sediments”.

Powerful AHTS vessels

Dynamic Positioning System (DPS)

An AHTS vessel (foreground) engaged in rig support operations
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An AHTS vessel (foreground) engaged in rig support operations