The range of Chartwell Marine Daughter Craft (DC) have been developed following an in-depth stakeholder engagement process with support from the Offshore Wind Accelerator (OWA) on behalf of the Carbon Trust.
The daughter craft range have lengths between 12-15m and are available in mono or catamaran hull form, depending on requirements.
All vessels are capable of operating at speeds of 20+Knots in sea states in excess of 1.5m Hs. Further, they have the ability to hold station on an offshore wind structure in similar sea state. This has been qualified through extensive model testing, both static and free running at 1:12 Scale.
All daughter craft can be launched and recovered using a MacGregor, Redrock or Vest Davit LARS.
The modular interior of the vessels allow for carriage for up to 12 passengers and 2 crew.
Propulsion can either be twin 300hp Diesel outboard motors, twin Volvo D6-IPS450 or twin Hamilton HTX30 waterjets. Each propulsion type allows the vessel to transit to and manoeuvre onto offshore structures, to safely transfer up to 12 passengers in seas equal to or greater than 1.5m HS.
With respect to seakeeping, a seakeeper device can be incorporated to the mono-DC to dampen the roll of the vessel (subject to client request).
The combination of diesel and electric outboards allows the vessel operator to select the most effective and efficient propulsion system depending on the vessel’s operational load case and task. This results in a reduction in fuel burn and therefore C02 emissions within a standard operational profile. When comparing against an example existing 12m catamaran using diesel inboard engines and waterjet propulsion, the vessel fuel burn can be reduced by as much as 38%. This is a result of vessel displacement, hull form design and the use of electric propulsion for slow speed operations.
