C Toms delivers Our David George
A new twin-rig trawler has been delivered by the C. Toms & Son yard to fishing company North Devon Trawlers, a joint venture between fisherman Scott Wharton and Barnstaple processor Coombe Fisheries, reports Phil Lockley.
Our David George is designed to alternate twin-rig trawling and scalloping, with capacity to switch over in only a few hours, reports Phil Lockley.
The alloy shelter deck can be unbolted and removed within two hours, providing access to the goose-neck to take the derricks. This makes it possible to switch between twin-rigging one day and beam trawling or scalloping the following day. Spending longer trips beam trawling during summer months isn’t ruled out.
The new trawler is designed by Ian Paton of SC McAllister & Co, and follows a series of coastal fishing vessels to his designs, although each has been tailored to suit the owner’s requirements as well as the tonnage and licences available.
Ian Paton explained that North Devon Trawlers wanted a larger vessel that the yard’s last delivery, Our Dylan Ben, and with a beam of 5.70 metres, the overall length had to be 13.50 metres.
“When we first developed 12m boats with a beam of five metres they were large in respect of their length, but didn’t have a true bulbous bow to ease the water flow,” he said.
“It was bulbous bow in profile but not bulbous in volume. Nowadays the bulbous bow gives the boat more efficiency, better when steaming - it reduces the bow wave - and it also gives better performance when towing. Because license requirements force today’s skippers to choose fairly short boats, pitching is inevitable, so we are doing our best to minimise what those constraints may deliver; but the style is continuously developing.”
To comply with local regulations and its license limit, output of the Volvo main engine is used efficiently by having a gearbox reduction ratio of just over 7:1, turning a shaft of 130mm in diameter and coupled to a four-bladed 1800mm diameter propeller.
The trawl winch is from Spencer Carter, and this has been tailor-made for Our David George as the owners wanted a three-drum winch, but also wanted the drums enlarged for maximum capacity to take long sweeplines, as well as to be powerful enough at top-drum level to be able to cope with seven dredges each side when scalloping.
“The winch has a first layer pull of about 15 tons; it is a strong winch with a top layer pull of around three tons. We are already in the process of making bigger winches, and not so much in the respect of power but in the drum capacity to take the length of the sweeps,” Richard Carter said.
“In addition we supplied two Rotzler cod end/gilson winches and those are mounted with two options of alignment on deck, one for trawling and one at 90° for scalloping. We also supplied a landing winch rated at around one tonne.”
Coastal Nets supplied the 14mm Acera warps and the 2.80m2 Polar Hercules trawl doors that are suitable for both bottom and semi-pelagic fishing
“The double-vented doors will give considerable spread to either single net or twin-rig gear,” said Rod Barr of Coastal Nets. “With the Acera warps being considerably lighter than steel warps, the spread is further increased. We have supplied quite a few sets of Polar Hercules doors and overall are having good feedback.”
Two sets of 15 fathom twin-rig balloon nets were supplied by Steve Simons of European Net Designs.
Our David George’s fishroom has been fitted out by Alpino Services with a refrigeration system and a Ziegra 1250 icemaker that produced seawater ice. According to Alex Pino, this is a completely tailor-made system, with 200 metres of 22mm stainless steel pipework, all TIG welded to the deckhead to eliminate the risk of corrosion and 45 meters of 16mm stainless steel piping at the deckhead. Expansion valves in the engine room prevent any corrosion from ammonia, which comes from skate, rays and dogfish.
“On the first test of the system, in just one hour we had the fish hold down to 1°C, and because that was the first operation of the system the deck hatch open. The hold had not been cooled before; so the speed that the temperature came down was very impressive,” he said.
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