VESSEL REVIEW | Aqua Helix – Dutch-designed proof-of-concept crewboat with 122-passenger capacity

Photo: Damen

Damen Shipyards Group, through its Damen Shipyards Antalya facilities in Turkey, has completed construction of a new high-speed vessel that had been developed in response to the offshore industry’s need for an alternative type of crewboat boasting cost-effective operation and improved safety features.

The Bureau Veritas-classed all-aluminium Aqua Helix significantly deviates from the typical crewboat design, being noticeably larger than its contemporaries. It has an LOA of 73.4 metres, a beam of 11 metres, a maximum draught of 4.5 metres, and a maximum deadweight of 105 tonnes. Its dimensions enable it to accommodate up to 122 technicians and 12 crewmembers on a single trip, allowing an operator to conduct fewer sailings and, in turn, keep fuel and maintenance costs to a minimum.

The foredeck has an area of 35 square metres and a deck load rating of 2.5 tonnes per square metre, making the crewboat an ideal vessel for cargo transfer duties as well. Transfers of personnel are done mainly via a custom-made Ampelmann motion-compensated telescoping gangway, which Damen said boasts reduced weight and electric cylinders to make it a near-perfect fit for the vessel. A basket that can carry 10 people is also available as a backup transfer system to and from the bridge deck.

Damen said that the vessel’s weight distribution has also been optimised for smooth and comfortable roll periods within the limits set by BV’s stability requirements. An efficient bow design makes it possible for the vessel to operate in significant wave heights of up to three metres and helps minimise occurrences of slamming, enabling fuel consumption to be reduced even further.

For improved comfort, there are reclining seats for all 122 technicians across two decks as well as amenities including two personnel areas, a bar, and a lounge. The interior spaces benefit from a 785,000BTU/hr air conditioning system and also feature wi-fi connectivity and personalised entertainment options in the form of video and music on demand.

Photo: Damen

The crew also benefit from the much greater interior space. The main and lower decks both feature crew cabins and technical spaces while the main deck also has a mess with an adjacent pantry. The wheelhouse meanwhile was designed to provide clear 360-degree visibility.

Four MTU engines drive HamiltonJet propulsion units via Reintjes VLJ-type gearboxes to deliver a maximum speed of 40 knots and a range of 800 nautical miles at a cruising speed of 37 knots. The engine room also comes equipped with a ventilation system in the form of two extraction fans.

A VEEM gyrostabiliser and Naiad Dynamics automatic active ride control interceptors ensure a comfortable ride even under typical operating conditions while a Kongsberg Maritime DP2 system helps guarantee safer transfers to and from offshore platforms. The crewboat also has a set of Veth bow thrusters for enhanced low-speed manoeuvrability during berthing and mooring.

Danfoss shaft generators supply electrical power for the vessel’s vast array of navigation and communication electronics, which include X- and S-band radars, compasses, ECDIS, two searchlights, GMDSS for A2 areas, a PA and intercom system, and an HSC-approved night vision camera. A 95ekW emergency generator has also been installed.

The crewboat is also adequately equipped for dealing with emergencies. The firefighting setup consists of sprinkler systems in the accommodation spaces, a fixed gas-flooding system in the engine room, and manually-operated extinguishers. Also fitted on board is a rescue boat with a davit launch system.

Aqua Helix will sail under the flag of Saint Vincent and the Grenadines. It will undergo further proof of concept trials in the North Sea later this year following the installation of its gangway.

Photo: Veth

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Aqua Helix
Type of vessel:Crewboat
Classification:Bureau Veritas I + Hull + MACH, HSC-code‒Cat A, Dynapos AM, Sea Area 3
Flag:Saint Vincent and the Grenadines
Owner:Damen Shipyards Group, Netherlands
Designer:Damen Shipyards Group, Netherlands
Builder:Damen Shipyards Antalya, Turkey
Hull construction material:Aluminium
Superstructure construction material:Aluminium
Deck construction material:Aluminium
Length overall:73.4 metres
Beam:11 metres
Draught:4.5 metres
Depth:5.5 metres
Deadweight tonnage:105
Capacity:35 square metres
Main engines:4 x MTU
Gearboxes:4 x Reintjes VLJ
Propulsion:4 x HamiltonJet
Generators:4 x Danfoss, each 450 ekW; 95 ekW
Side thrusters:Veth
Maximum speed:40 knots
Cruising speed:37 knots
Range:800 nautical miles
Radars:X-band; S-band
Dynamic positioning:Kongsberg Maritime
Audio system:Intercom and PA system
Cameras/night vision:HSC-approved night vision; CCTV
Other electronics:ECDIS; speedlog
Other deck equipment:Ampelmann motion-compensated gangway; crew transfer basket; rescue boat davit
Other equipment installed:VEEM gyrostabiliser; Naiad Dynamics active ride control; static fuel filter system; 2 x extraction fans in engine room; air conditioning
Seating:Reclining passenger seats
Firefighting equipment:Fixed gas-flooding system in engine room; sprinkler systems in accommodation areas; manually-operated extinguishers
Rescue boat:1
Fuel capacity:70,000 litres
Freshwater capacity:11,000 litres
Sewage/blackwater capacity:11,500 litres
Accommodation:2 x personnel areas; bar; lounge; lobby; crew cabins; mess/pantry; stores area; 2 technical spaces

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