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Builders of the GB52
Yacht deliveries
Marine project management
Tel:(+44) 07774 699511
Graveley Hall Farm, Graveley Hitchin Herts SG4 7LY
Fax:(+44) 01438 317112
E Mail GB Yachting
GB 52 Trawler Style Ocean Going Passage Maker

A unique concept:- As seaworthy as a Scottish Trawler but as comfortable as a Dutch barge.
Capable of 2500 + nautical mile ocean passages and navigating the larger inland waterways

GB 52 Statistics:-
L.O.A. 15.85m (52ft)
Beam 4.78 (15.7ft)
L.W.L. 14.72m (48.3ft)
Draft 1.65m (5.5ft)
Air Draught 3.4m (11.2ft) To top of wheel house with all
masts folded
Displacement 31100kg (empty tanks)
Hull Speed 9.7 kn
Engine 1 x 210 hp (155 kw) 2.48:1 gearbox, 26" propeller
Fuel Capacity 5100 litres approx
Water Capacity 1350 litres (+ water maker option)

GB 52 Opening new cruising possibilities:-
The basic thinking behind the GB52 concept is you can take a seagoing
vessel into inland waters but you can't take an inland vessel to sea.
The GB52, with live-aboard comfort, is designed to take it's owners in
safety across oceans (design range up to 3000 nm depending on tankage
options) and up to the head of drying estuaries. The major waterways of
Europe can also be explored at leisure. R..C.D. Catagory A

The hull is immensely strongly built of Lloyds approved A grade ship
building quality steel that has been grit blasted to S.A.2.5 and sprayed
with Sigma-weld MC welding primer. Further 2 pack epoxy primer and top
coats are applied during and after build.
The base plates are 8 mm thick and the remainder of the hull plates 6
mm. Deck, wheelhouse and cabin sides are made from 5mm plate. The bilge keel option gives increased roll stability and the ability
to take the ground upright. The keel supported rudder is large and
strong (35 degrees each way steering angle) and protects the 4 blade 26"
propeller from grounding.

The standard engine of 210 hp gives ample power to push against adverse
conditions but throttled back to half revs gives 7-8 knots cruising
speed at very economical fuel consumption. 2 x Anchor windless, power steering, dinghy hoist winch and two speed thruster are all hydraulically powered from the main engine.
The engine room below the wheelhouse is massive giving virtually standing headroom with ample space for easy maintenance and the installation of generators, watermakers, electrical systems, calorifies and boat heating systems. The service batteries are located here (8 x 105 Ah 12v giving 420 Ah @ 24v). There is even room for a work
bench and vice. Additional 2 water tanks totalling 1350 litres and 2 x 900 litre
fuel tanks are also positioned here at waterline level. Their ballast
effect can be used to dampen rolling movement. The main fuel tanks are
under floor forward of the engine room. (3600 litres in 2 tanks).

The derrick, mast and gantry are designed to be folded to deck level. The aft
gantry mast carries a 48" open array radar scanner, navigation lights
and other aerials.
Substantial mooring bollards with fairleads are at bulwark level.
Ground tackle consists of one 75kg main anchor,100mtrs 13mm chain with hydraulic
windlass. Kedge anchor option is 45kg Danforth type with 65mtrs 10mm
chain, hydraulic windlass and capstan.
The tender (ideally a 12ft RIB with 20 hp outboard is designed to be
stowed either in front of the wheelhouse (necessitating the forward
derrick option) or aft on the quarter deck via dinghy crane depending on

Accommodation consists of a large wheel house with an access door each
side, helm position with navigators seat and a large dinette area aft. The table can be lowered and in fills used to make a large double berth.
The main galley and saloon accommodation is in the huge aft cabin with
port lights each side and in the transom.
The forward cabins are to the owners choice but there is room for two
large double cabins with 5ft bunks. Two heads cabins, one en suite, and a twin bunked or single cabin.

BUILD OPTIONS: price guide:
Bare hull: Finished in epoxy primer, not faired. Ex builders yard £120,000.00
'Sailaway’: Hull painted. Hatches and port lights fitted.
Machinery and options fitted, deck fittings and ground tackle in place £320,000.00
Finished vessels in commission: from £455,000.00

OPTIONS: price guides:

Forward mounted dinghy davit with hydraulic hoist £4600.00
Quarter deck mounted hydraulic dinghy crane £8500.00
Bilge Keels £2800.00
Kedge anchor, hydraulic windless, hawse pipe and chain locker £2100.00
Second (exterior) helm position including steering, engine controls instruments, helmsmans seat and folding windshields £6650
Bowthruster 160 k.p.m. £6800.00
Rear mast, lowering £1500.00
Generator 7 kva £9550.00
Water maker £6800.00
Prop shaft thrust bearings ('Aquadrive') £4250.00
170 hp (125 kw) engine with keel cooling no extra charge.
Radar/plotter packages at m.r.p plus fitting costs.

The GB52 is a straight forward and robust design which is well suited to owner build and especially fit out.
A Design Package is available giving all information, technical and practical, from steel yard to launch.
Please contact Bill Franklin at GB Yachting for further details and information.

Terms: (for sail away option) 20% of final price with order
30% payable at the keel laying.
30% payable at completion of bare hull.
20% payable before launching.
Prices quoted are a guide only. Firm prices will be quoted against exact and finalised
specification. All cost net of VAT.

The vessel has attracted interest and positive compliments from
professional seaman and yachtsmen alike and won much praise for the
quality of build and fit out.

The noise level in the cabins and wheelhouse while underway have been
described as the quietest experienced for a boat of this type.

Her ease of handling and sea keeping qualities have inspired confidence
and proved her ability to complete passages without fuss and to plan.


This example is laid out with 3 sleeping cabins and 2 heads forward of
the wheelhouse with the large galley and saloon aft.

The sleeping cabins are trimmed in light maple with the owner’s cabin up
forward with a large heads en suite. It has a 5’ (1.55m x 2.0m) double
bunk with under bunk drawers and stowage, vanity unit and hanging
locker. 6’3”(2.03m) headroom.

The guest cabin also has a 5’ (1’55m x 2.0m) double bunk, under bunk
stowage, vanity unit and hanging lockers. 6’3” (1.90m) headroom.

The single cabin has a 3’ x 7’ (0.9m x 2.14m) single bunk, under bunk
stowage and hanging locker. 6’1” (1.86m) headroom.

The heads/shower cabins both have heated towel rails with travertine
basins, tile surrounds and floors. Electric, fresh water flushing

All the above are connected by a central companionway trimmed in maple.

AFT GALLEY AND SALOON: 10’6”x14’0”(3.20m x 4.27m) with average 6’2.5”
(1.90m) headroom:

Galley: Large granite double sink, induction hob, grill and 2 electric
ovens. Microwave. Keel cooled stainless steel Frigoboat fridge and
freezer. Solid maple worktops with numerous drawers and lockers. Full
size washing machine under worktop.

Saloon: 9’ (2.75m) corner settee with stowage under. Digital TV and
Radio/CD/ipod player with deckhead mounted speakers. Large under floor
stowage area.


10mm toughened glass windows all round, 4 half droppers, 2 top folding
screen windows, 2 top folding rear facing windows, 2 opening roof
hatches. Dogged access door to deck each side. Dining area aft, seating
on three sides, the table will seat up to 10 diners. The table top
lowers with infills to make a very spacious double berth. Digital
Radio/CD player with deckhead mounted speakers. Trimmed in Teak, with
iroco decked floor. 6’7” (2.0m) average headroom.

Helm position: Comfortable swivelling seat behind wheel. Power steering.
Chartplotter and radar, log, depth, wind, compass and ST8002 autohelm
with remote all by Raymarine. Electric engine controls. Bowthuster,
anchor windless controls. Screen wipers and washers. Navtex and SSB


Main engine: Deutz DTA66 210 bhp. Extremely smooth running and very
economical. Cruising consumption @ 8kn (1850rpm) = 10-12 lt/hr, or less
than 1.5 lt/NM giving a safe cruising range of 3000 NM (5000 lt tankage).
1:2.48 ZF Hurth hydraulic gearbox. Aquadrive thrust bearing driving 26”
x 23 degrees RH propeller. This gives very quiet and vibration free

Bow thruster, 2 speed hydraulic with controls at both wheel stations,
can be run continuously.
Main anchor windlass, hydraulic, with wander lead control at bow and
switched control at both helm stations.
Kedge anchor windlass, hydraulic with wander lead control from outer
helm station.
Dinghy hoist winch, hydraulic, 900 kg capacity, radio remote control.
Power steering from both helm positions.
All the above powered by main engine p.t.o. hydraulic pump.

Heating boiler is diesel burning providing hot domestic water and
central heating to towel rails in heads and matrix heaters in every
cabin. Wheelhouse front screen demist.

Domestic water: 2 x 316 stainless steel tanks totalling 1100 litres.
Pressurised system with 2000w immersion heater in 65lt calorifier. 2 x
400lt blackwater holding tanks with pump discharge and side deck vacuum
pump out connections .

Watermaker: Aquafresh AF600 240v AC. 60lt/hr capacity.

Generator: Kohler 7kva 1500 rpm in sound proof box.

DC Electrics: 8 x 125Ah batteries giving 500Ah.
.2 engine start AGM batteries 24v. Distribution and breaker panels. 2
solar panels. Shore power with galvanitic Isolator transformer and
distribution panel, 16 Amp capacity. 3000w Victron multi
inverter/charger. 240v ring mains to all cabins.

Engine room contains also the fuel transfer valves and racor type
filters. 2 x 875 lt fuel tanks are each side of the engine room, 1 x
2100 lt and 1 x 1100 lt tanks under floor forward. Fuel from these is
transferred to the engine room tanks by transfer pump via valve
manifold. There is a 5’6” x 2’ (1.70m x 60m) workbench with 4” (100mm)
vice and tool stowage. Standing headroom up to 5’6” (1.68m).
Fire protection by remotely operated 4 point discharge gas system.
Remotely operated fuel cut off valves. 2lt foam extinguisher in
wheelhouse and 1kg ABC powder extinguishers in every cabin. Fire escape
routes and hatches conform to RCD cat A.

Outer helm position: 2 swivelling helm seats, engine control repeaters,
chart plotter, depth/log multi function, power steering and autohelm,
bow thrusters and anchor windlass control.

On the foredeck anchor locker and gas locker hatches (gas locker
currently used for stowage). The capacious anchor locker contains
100mtrs of 13mm galvanized calibrated chain. Main anchor Halls pattern
stockless 55kg stows on stainless steel plates hull side of hawse pipe.
44lt/min deck wash pump foot switch operated.

Kedge anchor is 35kg with 60m of 10m calibrated galvanized chain.

Foredeck dinghy derrick with 900 kg hydraulic winch with radio remote
control. The mast is tabernacle mounted and can be quickly lowered to
below wheelhouse height. The light and aerial hoop above the radar can
be easily folded down to reduce the air draft to 4.85m. The complete
radar arch can also be lowered to farther reduce airdraft to 3.55m.

A bathing ladder can be attached either side at the boarding gates
extending 2’3” ( .7m) below the water line. A boarding ladder to the
waterline suitable for boarding tenders also can be attached here.

Instructions can now be taken for new build vessels to any stage of completion or simply project management and advise.


For any further information or details, please contact Bill Franklin on +44 7774 699511 or bill@gbyachting.com


Alternative example of interior layout.