Poole Dolphins - Keeping Tradition Alive

The Dolphin is a modern traditional dinghy with over one hundred years of history of sailing in Poole Harbour. It is a 16' clinker built sloop well ballasted with a heavy centreplate. Its simple but powerful rig makes it ideally suited to the sailor tired of life in the fast and wet lane but who does not wish to sacrifice the pleasures of competitive racing. It is ideal for cruising and its stability makes it ideal to take out youngsters. It is possible to attach an outboard via a bracket attachment on the transom in order to drive the boat when cruising.

The boat is a strict "One Design" in conception, The fleet comprises modern composite GRP boats and the majority are moored within the Marina. 

The class has a high percentage turnout for the various club series racing throughout the year. The racing is close and most crews have a good chance of high places during the season. The class also has a statistically high turnout during Poole Week. 

Dolphin owners and crews are unusually sociable for such a competitive class and enjoy the Club facilities.

If you would like to consider sailing the competitive classic for civilised sailors, contact any of those listed above for more information or a trial sail.

The Class is compiling a crew list and so if you are interested in crewing on a Dolphin please contact Peter Harris on 01258 840460, or 07507992890 or email to 


Class Captain: Peter Harris
Vice Captain: Sean Meharg
Webmaster: David Ceaton

​Class Pages


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Dolphin One Design Class Rules

(Updated April 2019)



1.1 To ensure that all boats measured as Dolphin One Design comply with the class rules at the date of measurement.

1.2 To promote and encourage the sailing and racing of the Dolphin One Design Class.


Class Association


Membership is open to all Dolphin owners who have paid the Class fee for the current year.


2.2.1 General The Class will be managed by the Officers who shall be the Class Captain, Vice Captain, Secretary and the Treasurer, and who shall be elected at the Annual General Meeting. At the Annual General Meeting, reports from the Class Captain, the Treasurer, the Secretary and the Technical Committee shall be received. Offices may be combined, but the number of Officers shall not be less than three. The Officers shall form the Class Committee which is empowered to conduct the proper affairs of the Class. The Class Captain shall take the chair at all meetings. The Committee may co-opt other members to help and advise as they see fit.

2.2.2. Technical The Technical Committee shall review and advise on the Class Rules and development, and shall consist of a minimum of 3 people, one of whom shall be the Class Captain of the year, who shall chair the meetings. Members of the Technical Committee will be appointed by the Class Association in General Meeting, and may co-opt other members to help and advise as they see fit.

2.2.3 Class Documentation The Class Captain will hold the current version of these Rules and the related drawings which will also form part of the digital records at Parkstone Yacht Club


2.3.1 The Annual General Meeting of the Class will be held between 1st October and 31st March. PAGE NUMBER ... 2 of 14


2.3.2 Extraordinary General Meetings may be called by the Secretary either at the request of the Committee or on receipt of a written request signed by not less than 5 members, giving full and clear reasons for calling the meeting.

2.3.3 Notice - 30 clear days notice shall be given to the Secretary of any proposition to be discussed at a General Meeting affecting alteration of the Class Rules. Such proposition(s) shall be in writing. 14 clear days notice shall be given in writing to all members of any General Meeting. and of any proposition to be discussed affecting alteration of the Class Rules

2.3.4 Technical Committee If, in his opinion, a proposition to be put to a general meeting has a technical aspect, the Class Captain shall ensure a prior meeting of the Technical Committee to consider the proposal and report to the general meeting on it.

2.3.5 Quorum members from six separate boats shall form a quorum at any General Meeting.

2.3.6 Voting Voting shall be by a show of hands and by proxy votes received by the meeting Chairman. Only one vote may be cast in respect of any one Dolphin and if any person owns more than one Dolphin they shall never the less have only one vote.

2.3.7 Majority Decisions shall be by majority vote, except that alterations to any section of the Class rules shall require a vote in favour of not less than two-thirds of those present and entitled to vote, and proxy votes received.

2.4 FEES An annual fee for each calendar year shall be decided by Members in General Meeting and shall be payable before any boat is eligible for any race result.

2.5 TRUSTEE The Class in General Meeting shall elect a representative of the Class to serve as a Trustee of the Class until the following Annual General Meeting.


Design and Measurement

3.1 AUTHORITY for the administration of the Design and Measurement Rules lies with the Trustees of the Class (The Trustees) who shall be: The Commodore for the time being of Parkstone Yacht Club. The Hon Sailing Secretary for the time being of Parkstone Yacht Club and a Representative of the Class Association elected in accordance with Rule 2.5. The duty of the Trustees shall be to act in the long term interests of the Dolphin Class.

3.2 ALTERATION OF RULES IN SECTION III These rules may be altered only following a resolution passed at a meeting of the Class Association in accordance with Rule 2.3, and approval of that resolution by a majority of the Trustees. The Trustees may PAGE NUMBER ... 3 of 14


seek guidance from any source that they see fit, including a further vote, ballot or referendum of the Class Association.


3.3.1 Measurement Rules The Design and Measurement Rules apply to all boats and sails certified or endorsed after 1st January 1994. All other boats, except D30 D31 and D33 shall conform to Class Rules as amended November 1988. D30 D31 and D33 may sail as built and as originally approved by the Technical Committee but shall conform to the following rules: 3.9; 3.11 to 3.20 inclusive. All replacement fittings and any major repairs to any of D30, D31 or D33 shall be carried out to bring the boat as close as is reasonably possible to the requirements of these rules. All boats up to and including D42 shall be deemed to be compliant with rules 3.10 (centreplate) and 3.11 (rudder).

3.3.2 Validity For the measurement certificate, sail and buoyancy endorsements to be valid, all hulls, spars, sails and equipment shall comply with the current class rules and Class Drawings Nos 1 (General Arrangement/Construction Plan), 2 (Centreplate), 3 (Rudder Assembly), and 4 (Spar Plan), or those class rules applying to them when the original measurement certificate was issued or endorsement signed. Any alteration, replacement or repair shall comply with the current class rules. None of the Class Drawings shall be used as scale drawings, but used only with reference to measurements, notes and specifications marked thereon. The Drawings are part of these rules and changes to the Drawings may only be made in accordance with Rule 3.2. Further, the Drawing shall be signed and dated by two of the Trustees at the time that they give their approval to the change.

3.3.3 Measurement Units All measurements shall be in metric units.

3.3.4 Measurers Sails may be measured by any RYA approved measurer but hulls and all other equipment shall be measured by any person who is a member of Parkstone Yacht Club and who has been approved by the Technical Committee.

3.3.5 Measurement Certificate Upon completion a boat is to be measured by the Class Measurer who will, in conjunction with the Class Captain, issue a certificate when satisfied that the boat is built to class rules and is “in keeping with the spirit of the class”. No boat is entitled to race unless the owner holds a valid measurement certificate.

3.3.6 Clarification Any builder/repairer/owner of a boat who is unclear of the interpretation or application of any part of Section III of the Rules, shall obtain an interpretation from the Technical Committee before proceeding further with any repair or building work. All such interpretations by the Technical Committee shall be reported to the next Annual General Meeting. PAGE NUMBER ... 4 of 14



3.4.1 Shell moulding and approved Builders The boat shall be moulded and constructed to a minimum specification (Rule. 3.4.2) only by builders approved by the Class Association. At this stage the hull will be measured by the Class Measurer. Completion work from the minimum specification may be undertaken by any party.

3.4.2 Minimum Specifications The minimum specification will denote the minimum level from which a non-approved builder may complete construction of a boat. The minimum specification to which an approved builder shall construct from the hull shell shall be: i) Forward buoyancy tank; ii) Main thwart; iii) Floor bearers; iv) Ballast Tray; v) Centreplate case; vi) Capping and Trimming; vii) Mast step block and viii) Mast bearing thwart.

3.5 SAIL NUMBER No boat shall be presented for measurement until a Sail Number has been issued by the Class Association.

3.6 DECLARATIONS The measurer shall not sign the measurement form for a G.R.P. hull until the measurer has examined the moulder’s certification which shall be appended to the measurement form.

3.6.1 Moulder’s Certificate The moulder of the bare hull shall certify in writing that the moulding complies with the class rules.


3.7 DEFINITION The sheerline is the fore and aft curve formed where the upper surface of the deck or gunwale meets the outside of the hull along the length of the boat.


3.8.1 Hull Shell The hull shell must be moulded in an approved class mould.

3.8.2 GRP Construction GRP hull shell and centreboard case construction and methods will be maintained in accordance with drawing number [insert details] the specification and practices used in the manufacture of Dolphin No. 30 and shall not be subject to alteration without the express permission of the Class Association. This laminate will be used uniformly throughout the hull surface. Additional materials may be used to fill the moulded keel, hog and stem.

3.8.3 Overall Length The overall length excluding rudder fittings shall not exceed 4893 +/ -10mm

3.8.4 Beam

i) The beam at a point on the sheerline 2.5m. forward of the transom measured around the sheer shall be 1735mm +/- 10mm

ii) The beam at a point on the sheerline 3645mm forward of the transom measured around the sheer shall be 1420mm +/- 10mm PAGE NUMBER ... 5 of 14


3.8.5 Sheerline The sheerline shall be a fair and continuous curve.

3.8.6 Gunwale The gunwale/rubbing strake assembly shall have a plan width not exceeding 35mm measured outside the sheerline and shall not extend more than 35mm below the sheerline.

3.8.7 Draining The hull shall not be self draining.


3.9.1 Weighing Boats shall be weighed with their internal and external surfaces dry to the satisfaction of the measurer. The total weight of the boat, excluding centreplate, but, including buoyancy and its fastenings, fixed fittings rigidly attached to the hull, floorboards and correctors, when stripped of sails, spars, rudder, tiller, pump, running and standing rigging and all other gear shall never be less than 300 kg. or if side tanks are used within the permitted buoyancy configuration (rule 3.15) then 315kg.

3.9.2 Correctors A corrector is a piece of any material added to the hull surface for the purpose of adjusting the total weight to comply with class rule 3.9.1. Corrector weights shall be located under the thwart close to the centreline up to the weight of 10 kg. Corrector weights required over 10 kg shall be equally divided into two and located on the inside face of the transom or on the transom knee and under the king plank at a point midway between the mast and stemhead and always above the waterline and clearly visible. In all boats, corrector weights shall be endorsed on the measurement certificate.


3.10.1 Operation The centreplate shall be raised or lowered only by rotation about a pin, bush or bolt, minimum diameter 10mm, passing through the centreplate and located in the centreboard case.

3.10.2 Location No device shall be used to allow any fore and aft or vertical movement of the pivot point. The pivot point shall be located according to class drawing number 1.

3.10.3 Centreplate Drawing The centreplate shall comply strictly with class drawing number 2.

3.10.4 Deleted

3.10.5 Centreplate Materials The centreplate shall have a maximum of 10mm and minimum 8mm thickness and be made from mild steel or stainless steel plate. If a plate less than 10mm thick is used the difference in its weight between 53kg (being the weight PAGE NUMBER ... 6 of 14


of a standard 10mm mild steel plate) and the stainless steel or mild steel plate so used shall be carried as corrector weights placed under the main thwart or midships under the floorboards.

3.10.6 Centreplate Surfacing Centreplate surface finish is optional.

3.10.7 Centreplate Mechanism The lifting mechanism shall be a winch system, the design and materials of which are optional.

3.10.8 Centreplate Locking The centreplate shall be able to be locked in the up position by means of a suitable pin.


3.11.1 The Rudder Blade shall be raised and lowered about a fixed point shown on class drawing number 3 and shall be a minimum 3mm steel plate or minimum 5mm aluminium. The blade shall be profiled to the class drawing number 3.

3.11.2 The Rudder Stock shall comply with class drawing number 3.

3.11.3 The Tiller shall be removable from the stock. The tiller shape is optional but shall be housed in the stock in accordance with class drawing number 3.

3.11.4 A Tiller Extension of optional size can be fitted to the inboard end of the tiller.

3.11.5 The Rudder The rudder shall be transom hung by means of a lower pintle and upper gudgeon

3.11.6 Rudder Location The maximum distance between the leading face of the rudder stock and transom shall be a maximum of 60mm.


3.12.1 Rig The rig shall be a single masted Bermudan Sloop supported by a forestay and two shrouds.

3.12.2 Shroud Plates The centre of the bearing hole of the shroud plates shall be 3187mm + / - 10mm forward of the transom measured around the sheer. The shroud plates shall be adequately fastened to the hull.

3.12.3 Mast Location The forward face of the mast shall be 3605mm + / - 10mm from the outside of the transom at deck level measured along the centre line. PAGE NUMBER ... 7 of 14


3.12.4 Height Measurements Height Measurements shall be taken along the aft edge of the mast from the upper edge of the lower band.

3.12.5 Mast Movement No fore and aft or athwartships movement of the mast is allowed at deck level.

3.12.6 Bands Measurement Bands minimum 10 mm in width shall be clearly marked on the mast and boom so that they encircle the spar. Only one set of measurement bands is permitted.

i) Upper band - no part of the mainsail or headboard shall extend above the lower edge of the upper band, the height of which shall not exceed 6245mm from the upper edge of the lower band.

ii) Lower Band - The mainsail shall not be set below the top edge of the lower band. The top edge of this band shall not be more than 760mm above sheer or less than 720mm above sheer in way of the aft edge of the mast when the boat is rigged as it is raced.

iii) Boom band - no part of the mainsail or cringle shall extend abaft the forward edge of this band. This band shall not exceed 3045mm measured from the aft face of the mast.

3.12.7 Deleted

3.12.8 Foresail Luff Intersection The point at which the luff of the foresail being extended cuts the foredeck shall not exceed 75mm when measured along the foredeck to the most forward part of the hull including the stemhead fitting.

3.12.9 Mainsail Sheeting The mainsail shall be sheeted from the main boom abaft of the boom band to a track on the transom. The sheet shall be lead forward under or through the boom to a central block and cleat mounted on the centreboard case aft of the main thwart.

3.12.10 Foresail Sheeting The foresail shall be sheeted to fairleads mounted either side on the inboard face of the coaming or to turning blocks attached to the fairlead. The centre of the sheave of any such block shall never be more than 150mm from the inboard face of the coaming when measured athwartships. The fairleads shall be mounted on tracks to allow fore and aft movement of the fairlead.

3.13 SAILS

3.13.1 General

i) Anything not specifically permitted within Rule 3.13 is prohibited.

ii) Sails shall be made and measured in accordance with World Sailing’s current “equipment rules of sailing” (ERS) except where varied herein. Where a term is defined, or a measurement given in the ERS, it is given in “italic” type. PAGE NUMBER ... 8 of 14


iii) The mainsail battens but not the top batten may be sewn into the sail. The leech measurement should be measured with only the top batten removed.

iv) The manufacturer of sails is optional.

3.13.2 Mainsail Construction

i) The construction shall be: Soft sail, single ply sail.

ii) The body of the sail shall consist of woven ply throughout. The ply fibres shall be of polyester. Reinforcement shall consist of the same materials permitted in the body of the sail. A window or windows if fitted, shall be covered by transparent ply.

iii) The sail shall have a full length top batten and three other battens to support the leech.

iv) The following are permitted: Stitching, glues, woven and PTFE tapes, bolt ropes, corner eyes, tack strap and buckle, velcro or other fastening, headboard with fixings, Cunningham eye/pulley, batten pocket elastic, batten pocket end caps, batten retaining/bending devices, mast and boom slides, leech line with cleat, a window or windows located below the half width measurement, sailmakers labels as permitted by the ERS, sail numbers and class insignia, tell tales.

v) There shall be one set of reefing points, one extra set is optional. vi) Ply weight of mainsail is 200 grams per square meter