Seaward 35 ‘Gullfoss’ £235,000

Seaward 35 ‘Gullfoss’  £235,000 VAT Paid


Gullfoss boasts the larger twin Yanmar 370hp engines and a Fischer Panda compact generator, all meticulously maintained and upgraded.  Designed for a very experienced owner to complete long-term liveaboard cruising, there are many custom fitted lockers and cupboards divided to increase stowage volume.  Gullfoss is for sale by her original owner who has ensured that she remains serviced and maintained to very exacting standards.  Gullfoss makes for an exceptional long distance cruiser with facilities and comforts to allow prolonged stays on board.

After testing the Seaward 35 in the overfalls off Guernsey, the Motor Boats Monthly boat test confirmed the sea-keeping qualities when they wrote: ‘The sea conditions through which we pushed the Seaward 35 would have forced most other boats of a similar size, and indeed many larger craft, down to a crawl. Worse, their occupants would have been turning green with seasickness or white with fright. For us these are perfect test conditions. Perfect that is if you are in a boat built for the job’.

Gullfoss was featured in Motor Boats Monthly you can read the article here:



Click Here for more Pictures (taken January 2021)


LOA: 10.62 mtrs

Beam: 3.5 mtrs

Draft: 1.1 mtrs

Displacement Approx: 10.00 tonnes 

Designer: Arthur Mursell, TT Boat Designs, Isle of Wight.

Builder: Seaward Marine Ltd, Cowes

Year: 2011

Construction: G.R.P. 

Mechanical Data: 2 x 370hp Yanmar diesel engines giving maximum speed of 28 knots. 

Engine running hours: approx 850 hrs.

Bow thruster

Heated windscreens

Blown air diesel heating system

Stern platform

Gas hob and oven

Microwave oven

Twin sink galley

Victron unit for house (starboard) battery bank and 240v supply from battery bank Separate dual charger for port engine battery bank and generator battery

Fischer Panda Generator

Bow cabin double bed designed for tall owner

Full length hanging locker adjacent to bow cabin plus shelving

Wet hanging locker in wheelhouse

Dedicated storage for bottles and glasses in wheelhouse

Deep storage locker in front of co-pilot seat for navigation books and separate book case in wheelhouse

Large chart drawer in dinette

Four seater dinette with infill to make double berth

Wheelhouse settee converts to full length single berth

Unique custom folding cockpit table

25 kg plough anchor and 55m of 8mm chain. Anchor in customer bow roller with additional guide for swinging mooring, alongside the anchor roller.

Regular maintenance specifically in recent years including:-

Repainting of deckpaint plus cockpit floor

Renewal of all six batteries (triple house starboard bank, twin port bank and single generator start battery)

Major cleaning and overhaul of salt water cooling circuit

The vessel comes complete with spare alternator belts, water pump impellers, anodes, oil and fuel filters etc

Gullfoss is Designed to Liveaboard

A few examples outline the commitment by builder and owner to engineer a very practical and easy to use boat:-

Independent Cruising

The 75 gallon capacity water tanks allow up to 10 days cruising with sensible use. The 1350 litre total capacity fuel tanks enable a 300 mile fast cruising range with 20% reserve and at 12 to 15 knots cruising speed, using only 2.5 to 3 litres per mile a 400 mile plus range.

The combinatory of main engine alternator battery charging combined with the Victon Unit and separate additional charger allows seamless transition to mains and battery supported 240v usage. Ranging from a special socket adjacent to the mirror in the bow cabin for a hair dryer or curling tongs, to multiple galley use including the microwave oven, mains electric toaster (which has its own cupboard) and a 240v kettle. The generator enables a combination of battery charging, electric heating and direct power for galley and other uses including powering the domestic hot water immersion heater.

The blown air diesel heating system provides a cozy, snug boat even on cold days with outlets throughout the boat

Mooring and Anchoring

Substantial cleats are provided on the stern to enable backward facing trot or similar mooring. The combination of bow, midships and stern cleats with appropriate fairleads facilitate pontoon mooring in any arrangement. A one off modification is the addition of stainless steel rubbing strips on the gunwhale to prevent spring mooring ropes rubbing the grp moulding. Pontoon mooring is safe and easy, the crew can wait on the bow surrounded by the large pulpit, when alighting mid ships the inboard rails provide a fantastic handhold to support stepping onto the pontoon, no “leg over a wire” or any restrictions here and no need to jump from a stern platform!

Finally in addition to the larger than standard 25kg anchor and chain secured when cruising in a custom bow roller, a second guide and “cheek” arrangement enables stable, secure and silent mooring from buoys by rope or chain without lugging the anchor out of its roller.

Using the dinghy

A dinghy hidden in the vast lazarette in the cockpit is too hard to use easily, potentially missing opportunities. Gullfoss has very substantial eyebolts on the foredeck which enables a deflated inflatable dinghy up to 3.4m to be stored safely and securely at sea.   At anchor or when moored the dinghy (which when stored does not restrict anchoring or mooring) can be unrolled across the combination of the inboard handrails and the longer than standard pulpit for safe and easy inflation and launch. Taking the dinghy to the robust stern platform which has additional handrail/dinghy mooring features and is accessed from the cockpit via a substantial ladder, allows the auxillary engine to be easily removed from its bracket on the stern and fitted to the dinghy. The platform also enables easy boarding of the dinghy (and additionally can be very helpful if mooring fore and aft to buoys).

The addition of a ‘Snap Davit’ system to the bathing platform could allow the inflated dinghy to be carried at sea, ready for instant use.

Living aboard and storage

The galley has been designed to cook in!  With a larger than standard fridge and multiple storage drawers and lockers from cutlery to toaster and spices to rice!

In short also every conceivable void has been used, not all of which can be spotted in the photos. Canned food can be stored on shelves custom fitted under the steps. The bin is in a custom locker, lift a lid on the galley worktop, and you have access to both the bin (and because there was space, a locker in which up to 20 cans of beer can be stored). Whilst most boats have an impossible to reach under-berth bow locker for loo rolls, the galley cupboard has a shelf under the microwave oven to store one dozen toilet rolls and several kitchen towel rolls. The bow cabin under-berth storage bins have false floors to allow shallow “easy” access and deeper additional space to store the 20 novels you may wish to take along too!

Opposite the heads are two doors, the first gives access to a full length hanging locker with space for a few long dresses, jackets and trousers. The second door opens to reveal a stack of shelves where clothing, bedding and towels can be stored. “Back up” clothes are accessible and can be kept flat in breathable storage bags underneath the bow cabin bed and in the dinette. What about dirty clothes and towels? – No problem, a storage bin right aft in the cockpit locker has masses of space to loose them!

When it rains….the covered cockpit is an excellent place to dry anything and the inclusion of a wet-locker in the wheelhouse, near the door to the cockpit gives storage for lifejackets and oilskins just where you need them.

Lying: Solent

Viewing: By appointment via The Boat Development Co Ltd

Asking price: £235,000  (VAT Paid)

Selling Agents: The Boat Development Co Ltd, Prospect Road, Cowes, Isle of Wight PO31 7AD

Tel 01983-280333  EMAIL:

Contact: Angus Belcher

The particulars detailed herein are intended to give a fair description of the vessel but their accuracy cannot be guaranteed. These particulars are not a part of any contract or offer and are supplied on the understanding that all negotiations shall be through The Boat Development Co Ltd, who are acting as brokers only. The prospective purchaser is strongly recommended to check the particulars and, where appropriate at his/her own expense, to employ qualified agents to carry out surveys, structural and/or mechanical and electrical.