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Where:Launched at the IHC Merwede yard in Hardinxveld Giessendam, Netherlands.†Operating in the North Sea based in†Aberdeen, Scotland.

Specified:
6 x AvK DIG 156 AC alternators†and
1 x AvK DSG 86 AC alternator

Purpose:Diving support vessel for saturation†and air diving support work

Seven Atlantic, the diving support vessel was†designed by IHC Merwede Offshore & Marine†in collaboration with its owner Subsea 7 and the maritime engineering company Bakker Sliedrecht. Its power is generated†by 6 x AvK DIG 156 synchronous alternators from Cummins Generator Technologies, specified by Bakker Sliedrecht. The 6 x AvK DIG 156 alternators†are backed up with 1 emergency AvK DSG 86 alternator.

 
Diving support vessel 'Seven Atlantic'

Being one of the most advanced and†most capable diving vessels in the world, Seven Atlantic contains a broad range of diving and ROV (Remotely Operated Vehicle) equipment and a 120 ton crane for subsea on board. She also features a 24-man saturation diving system rated to 350m depth, twin diving†bells orientated port and starboard with two hyperbaric lifeboats.

With a length of 145m and a breadth of 26m it is†one of the largest diving support vessels worldwide. Bakker Sliedrecht, who is the world leading†engineering company for complete electrical systems†on high-engineered ships, was responsible for the†delivery of the alternators, generatoring†sets and the†emergency alternator, the entire electrical installation†on the vessel, the main switchboards, various†frequency drives and propulsion motors, the motors†for the thrusters and several rotating converters.

The 6 x AvK DIG 156 diesel alternators on Seven Atlantic are divided over three engine rooms and have a maximum output of 3,600kVA, a speed of 720rpm, a voltage of 6,660V and a frequency of 60Hz. The emergency alternator AvK DSG 86 has†a maximum output of 1,875kVA, speed of 1,800rpm, voltage of 440V and a frequency of 60Hz.

This is only one of many projects where Bakket Sliedrecht have specified AvK alternators. The reputation for quality and reliability, coupled with outstanding technical support made AvK and Cummins Generator Technologies the logical partner for Bakker. Seven Atlantic's sister ship,†the Seven Pacific, also part of the Subsea 7 fleet,†features 5 x AvK alternators†providing again 17MW of power, is also now fully operational.

Author Name
George Swindale