Anchor handling tug supply vessel

Anchor Handling Tug Supply (AHTS) vessels are mainly built to handle anchors for oil rigs, tow them to location, and use them to secure the rigs in place.

Many of these vessels are designed to meet the harsh conditions of the North Sea, and can undertake supply duties there between land bases and drilling sites.

AHTS vessels differ from platform supply vessels (PSVs) in being fitted with winches for towing and anchor handling, having an open stern to allow the decking of anchors, and having more power to increase the bollard pull.

The reference load used in the design and testing of the towing winch is twice the static bollard pull.

[3] The world's strongest tug since its delivery in 2020 is MV Island Victory (Vard Brevik 831) of Island Offshore, with a bollard pull of 477 tonnes-force[4] (526 short tons-force; 4,680 kN).

ROV at work in an underwater oil and gas field. The ROV is operating a subsea torque spanner tool on a valve on the subsea structure.