Gibdock completes PSV upgrade

The refurbished ‘Toisa Vigilant’ leaving Gibdock The refurbished ‘Toisa Vigilant’ leaving Gibdock
Industry Database

Gibraltar’s Gibdock shipyard has successfully completed a challenging maintenance and upgrade programme on the 6,430bhp DP2 class ROV/subsea service and platform support vessel, ‘Toisa Vigilant’.

The 2005-built, 3,426 dwt vessel spent over three weeks at the yard in July and August for a diverse package of works. As John Taylor, Gibdock production director, explained, “This project was essentially two contracts in one as we carried out separate jobs for the owner, Sealion, and charterer, WesternGeco, in parallel.”

For Sealion, Gibdock undertook a series of conventional docking works, including the extensive overhaul of the MAK 8L26 main engines, the two bow thrusters and two stern thrusters. In addition, the yard refurbished and repaired other parts of the vessel, including the sea valves, cranes and lifeboats, while also painting the underwater areas of the hull.

Main engine and thruster components were removed from the Toisa Vigilant and taken to Gibdock’s workshops, where an inspection, calibration and full overhaul was carried out, before being returned to the vessel. According to Taylor, “This was the most challenging part of the project as we only had a limited time in which to complete work to the main engines and thrusters. We worked two shifts in parallel to make sure we got the job done in the time frame specified by the owner.”

Charterer WesternGeco contracted Gibdock to replace equipment onboard used as part of experimental seabed scanning systems. A section of deck was cropped, a transformer unit weighing around 20 tonnes was removed and a new unit installed in its place. Deck areas were reinstated, a protective cage installed around the transformer unit and additional ladders and rails fitted.

On the strength of the quality work carried out on Toisa Vigilant, WesternGeco booked a vessel on its own account, the seismic survey ship Western Trident, which entered Gibdock for an extensive package of works during August and September.


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