Following the contract signing in April of 2007 Mustang set about the task of developing the computer model of the hull and superstructure using their in-house CAD. This exercise made use of information provided by west of Scotland naval architects Murray, Cormack Associates, who were under contract to the Aberdeen Harbour Board. On completion of this task the steel and aluminium plate was cut to form a fabrication kit for later assembly in Mustang’s covered building hall, This part of the construction programme started last July.

Work began on the accommodation areas in November. The vessel has a significant fit out below decks, with seating for up to six people around a table in the forward cabin as well as a galley with cooking facilities, refrigerator, sink and worktops aft. Opposite the galley is a WC compartment. The wheelhouse enjoys a similarly high level of fit out, with suspension seating for the crew, pilot and surveyor in addition to bench seating and further large chart areas on top of lockers. A van Cappellen acoustic insulation package provides very low noise levels in the accommodation and wheelhouse areas.

Like the Sea Shepherd, the new vessel will be powered by a pair of Scania DI12 diesel engines, driving Twin Disc gearboxes and making use of the Twin Disc EC300 control system. A small Onan generator set is also installed in the spacious engine compartment and the remainder of the engineering fit out is similar to the first vessel. Owner trials commenced in April and the vessel left Milford Haven later that month after they were successfully completed.

Aberdeen Harbour Board's operations director and Harbour Master, Captain Ray Shaw said, 'In combination with other projects, the Sea Haven will make an important contribution to the port’s capabilities in handling increased traffic above the current record levels, and to the efficiency of operations generally.'

Kevin Lewis, Mustang Marine’s managing director added, 'The project has been very interesting for us. Sea Haven has a very high specification for a vessel of her size and type. We have risen to the challenge and are delighted with the outcome. It has been a pleasure to work with Aberdeen Harbour Board.'