Sonardyne supplies navigation tech to LV 108

McDermott lay vessel gets new subsea package to help with dynamic positioning

Maritime contractor Sonardyne has supplied acoustically-aided inertial navigation technology to construction and installation player McDermott International's Lay Vessel 108 (LV 108).

The Ranger 2 Pro DP-INS system will support touchdown monitoring surveys of submarine cables, umbilicals and pipelines and as an independent position reference for the LV 108's Kongsberg dynamic positioning system.

No contract value was disclosed.

LV 108 entered service in 2015 and is currently on contract in the Inpex-operated Ichthys field, Western Australia.

Sonardyne said the new equipment will help the vessel with station-keeping, which can be difficult for dynamically positioned units when ultra-short baseline acoustics are "compromised". This can often happen around equatorial regions and during periods of high solar radiation, Sonardyne said.

"In addition to the system's deep-water positioning performance and safety benefits, DP-INS has been proven to deliver valuable time and cost savings for vessel owners," Sonardyne said.

"The system does not need a full seabed array of transponders to be installed and calibrated before subsea operations can commence."

The equipment supplied to McDermott for the LV 108 included Sonardyne's INS sensor co-located with the company's sixth generation HPT acoustic transceiver.

"The decision to equip the LV 108 with Sonardyne's DP-INS reflects our approach to fleet expansion and renewal," said Jason Peters, global survey manager at McDermott.

"This strategy focuses on ensuring our vessels and acquisitions keep abreast of the industry's growing demand for safe, efficient, cost-effective installation solutions for field developments across all water depths."