Damen Delivers Purpose-built Offshore Chasers

Monday, June 24, 2013

The delivery of the Aquarius-G and her sister ship Astra-G to offshore services company RederijGroen (Scheveningen, the Netherlands) marked a milestone in Offshore Support Vessel construction. According to Damen, never before have such Chasers have purpose-built. The vessels were designed by Saltwater Engineering in close cooperation with both RederijGroen and Maaskant Shipyards Stellendam. Both Seismic Research Support Vessels were constructed by Maaskant Shipyards Stellendam, part of Damen Shipyards Group.

“Indeed, all our other SRS Chaser vessels so far involve converted fishing trawlers”, HenkGroen, director and proprietor of offshore company RederijGroen proudly noted about his new twins. “Having designed them to our specific needs right from the drawing board significantly enhances the vessels’ deployability and performance. Their sharply reduced sway and maneuverability are just two examples”, Mr. Groen added.

The Aquarius-G and sistership Astra-G are Guard Vessels or Chasers. One major task is to ensure that other shipping, mainly fishing ships, will keep distance from Seismic Survey Vessels engaged in offshore exploration. To literally chase-off. The trawlers’ nets might otherwise damage the costly seismic streamers trailing behind the survey vessels.

A further key activity for the SRS vessels are the alongside operations, featuring a variety of services to the seismic survey mothership. Whilst sailing alongside, such assistance includes the board-to-board transhipment of goods and equipment. The two new SRS vessels have a two-ton at a 10.5-meter reach deck crane. The 105 square meters of free space at the aft deck provides sufficient storage capacity to include several ISO maritime containers. An aggregate 16 cubic meters of temperature controlled cells cater for other auxiliary services.

As a significant improvement, the two purpose-built Chasers feature superior nautical capabilities over the converted fishing trawlers, Damen said. Their sharply lesser sway benefits both the alongside operations and the crew’s comfort.

“Seismic research is done at a sailing speed not exceeding four knots. At such low speeds, the ship needs to be both stable and maintain good maneuverability”, HenkGroen says. SRS vessels also measure sea current near offshore rigs to ensure a safe close passage for the seismic survey ship. “So keeping lane at very low speeds is vital for this precise work.” All of this is being put into practice as the Astra-G is currently working at its first assignment in the BarentzSea.

The Aquarius-G was named by the granddaughter of Mr.HenkGroen and daughter of Mr. Erik Groen. The Astra-G, however, was named by Mrs. Gerda van Dongen, wife of Maaskant director Frits van Dongen. The rare phenomenon for a shipyard naming its own product, underscores the close ties with offshore company RederijGroen. “For decades Maaskant has been performing maintenance and repair for our entire 22-strong fleet of offshore vessels”, shipowner Groen noted. “Futhermore, we have built all their other SRS vessels”, Mr. Van Dongen added. “These all involved fishing trawler conversions. Until now that is.”

The two novel Seismic Research Support Chasers have a 40-meter length over all, 9.3 meters width, 3.3 meters draught, with accommodation for a complement of fourteen. Top speed is 14 knots.



Maritime Reporter September 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds


Two RAscal 1500 Tugs Delivered

Sanmar Shipyard of Turkey has recently completed two RAscal 1500 tugs for Jordanian owners. The tugs are now delivering marine services to the FSRU berthing

MacGregor Hatch Covers for Six Boxships from Japan

MacGregor, part of Cargotec, has signed a contract for the design and delivery of key components and the fabrication of steel structures for the hatch covers on board six 14,

Stiff Competition for Cosco Pacific in Mediterranean

Although Cosco Pacific, the Hong Kong-listed subsidiary of China’s biggest shipping company China Cosc,  is expanding in the Mediterranean area after taking part


Rieber Amends Dolphin Deal

Norwegian shipping company GC Rieber Shipping ASA has entered into an agreement with Dolphin Geophysical to increase Dolphins competitiveness in a challenging market.

Willard to Build 3 Survey Ships for NOAA

NOAA awards shipbuilding contract to Willard Marine for the construction of three aluminum survey vessels   Willard Marine informs it was awarded a contract to

Maritime Contracts Maritime Standards Naval Architecture Navigation Offshore Oil Salvage Ship Electronics Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1726 sec (6 req/sec)