Farm visit – Workboat
On heavy
duty
Dutch built utility vessels designed for open ocean conditions
M
arine Harvest Scotland’s investment in its most exposed sites has seen the delivery of two new workboats for the area. The Dutch built Beinn Mhor and Beinn Scorabhaig are designed to be robust and seaworthy vessels with stable handling characteristics on the open ocean, ideally suited to the most north-easterly part of Scotland in an area that is notorious for its severe weather. The 1507 utility vessesls, supplied by Maritiem Cluster Friesland and Nauplius Workboats, boast exceptional manoeuvrability and can almost turn on their own axis. A notable feature is that their hulls and decks above the waterline are hot zinc spray metallised, providing the steel with a corrosion resistant layer. This makes the hull more durable for heavy duty use, and it will not rust as easily in the event of damage to the paint system. The normal paint system is applied over the corrosion resistant layer. The boats are equipped with two hydraulic capstans on the starboard side and a hydraulic HS Marine AK30 HE4 crane on the aft, with a lifting capacity of 3,855kg at 5.23m and 1,080kg at 13.16m. Both vessels are specifically adapted and designed for fish farms: everything has as round and smooth a finish as possible. ‘We can’t have any nets being torn or anything getting caught,’ said Gerrit Knol, naval architect at Nauplius Workboats in Groningen. ‘To be able to work extra cleanly, a net washer and pressure washer are
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installed to disinfect everything. After all, the ships work in the food industry. ‘The design was developed to make everything antiseptic as much as possible. It was very important to minimise places where residues could be left behind. ‘Outlets and openings in the hull are on the port side because the ship is moored on the starboard side at the fish farm.’ There are doors in the gunwales at the starboard and stern of the ship to make work in the farms easier. Knol designed the workboats in close collaboration with Maritiem Cluster Friesland, the builder, and the Scottish client. ‘The ship has a work deck of 65m². That’s unprecedented for a ship of these dimensions,’ said Knol. ‘The deck is also designed for heavy deck loads of up to two tonnes per square metre. In total, the deck can carry 32 tonnes of cargo.’ A special feature is the maintenance friendly construction, according to the builder TjeerdWiebe Bijlsma, owner of Maritiem Cluster Friesland. ‘The client asked for the hot zinc spray metalising, which is not common in ships, but certainly provides added value in a workboat that is at sea 340 days per year. ‘The ship is versatile and can be used as a general work ship, diving platform and in hydraulic engineering or offshore.’ The wheelhouse is designed for an optimal combination of work space and mess room without affecting the work space for the captain. There is enough free space in the fore cabin to build in berths and a galley if desired later. This is currently used as storage space. ‘The client did not have the accommodations built in for now because the ship is only going to be used for day work. ‘The spacious machine room is equipped with two 172 kW John Deere type 6068 AFM 85 engines that power both propellers. ‘The top has a relatively robust construction
Left: The 65 square metre work deck with crane. Opposite page clockwise from top: Beinn
Mhor and Beinn Scorabhaig; the wheel
house is designed for an optimal combination of work space and mess room; the engine room; the Beinn Scorabhaig sailing during the sea trial
THE FACTS Main engine: John Deere, 6068 AFM85, 172 kW / 230 Hp - 2300 Rpm Gearbox: TwinDisc, MGX 5090A Generator: John Deere 3029 TFG 89 Capstan: Tjenford Industry, N300-5000, Hydraulic driven Length overall: 15.50m Breadth overall: 7.32m Depth: 2.00m
www.fishfarmer-magazine.com
09/08/2016 15:23:28