Class Rules



1.0 Class Charter. The F-25C Class Association will provide owners events (both racing and cruising) for all F-25C, F-9A's and F-36's that are finished and launched and are paid class members. The Class Association will maintain a newsletter for the membership and conduct all functions required to promote events and the one-design F-25C Class trimaran. (See Rule 18.7)

1.1 Intent. The design and development of the F-25C are directed toward a strict one-design class where the true test is between sailors and sailing skill, and not between boats. Any alterations to the hull form or hull appendages, any altered construction, changes to spar, sails, or standing rigging, from the specifications in the construction manual as is specifically authorized by the Class Rules, is a breach of rules, both in spirit and in substance, and prohibited. Maintaining strict equal sailing platforms is the only way one can improve on one's helmsmanship, crewmanship, and learning of the fine art of rig and sail tuning.

1.2 Owner Variances. Because the boats are supplied in kit form, some latitude will be given to an individual builder/owner for customization. This customization should be limited to color, interior layout, and deck layout but is to be consistent with the philosophy and intent of these rules. Under no circumstance will a bylaw allow any change that would enhance hull speed or increase structural loading. The Class Association may petition the Licensed Manufacturer for major changes after a simple majority Class vote (minimum of twenty members with a return response of 33%), accompanied with complete class approved implementation plans. The final decision can be made only by the Manufacturer after consultation and approval by the Designer.

1.3 Class Democracy. Although Class membership is open to non-F-25C owners (e.g. F-9A, F-25A and other interested parties), Class voting rights are restricted to one vote per each F-25C hull and pair of floats owned (i.e., "one boat, one vote").

2.0 Safety. Any significant safety improvement or structural weakness can be brought to a vote at any time and/or immediately implemented by the Licensed Manufacturer.

3.0 Hull, Deck & Float Forms and Beams. The main hull & deck, floats & decks and beam forms cannot be altered in any way to change the basic shape that the Manufacturer supplied. Minor cosmetic changes are allowed and these are limited to painting and cosmetic faring. Damaged areas must be repaired to duplicate the shape provided by the Manufacturer. Assembly must be as per plans and any future modified boat will be excluded at the discretion of the Board of Directors.

4.0 Appendages. There are no changes allowed to the appendages, except as follows:

4.1 Centerboard and Daggerboard. The centerboard and daggerboard forms are both Class legal when build and placed in accordance with the plans. Modifications to the cross-sections of these foils are not allowed. Daggerboard and centerboard openings should allow for the use of gaskets or filler material.

4.2 Rudder System. The rudder system is limited by the plans for placement, size and cross section. No modifications are allowed. A transom rudder shall be class legal (once design has been approved by the Designer), as long as the cord and surface area of the underwater rudder section does not exceed that of the "stock" (or under-hung) rudder. Any daggerboard type rudder must be kept fully down when racing.

4.3 Bowsprit. The bowsprit must be connected in the fixed housing per the plans. The bowsprit can be built per plans or purchased, but must not exceed 72 inches past the flange of the hull. The bob stay must be in place and connected to the furling drum or the end of the bowsprit.

5.0 Nets, Life Lines and Pulpits. Nets, life lines and fixed pulpits are essential safety features of any boat. As local rules and conditions will warrant their use, the F-25C Class prescribes only the following

5.1 Pulpits. Bow and stem pulpits are not restricted in size, material, placement and use.

("and use" -- not required)

5.2 Life Lines and Jack Lines. As local conditions and offshore rules may dictate these features, the F-25C Class does not restrict size, material, placement and use.

5.3 Nets. Wing nets must be in place and sized per the plans. All nets must be an open mesh and the use of a solid 'non-vented' material is not allowed. Bow nets are optional. Fitting method is optional and flaps around edges to cover open areas or to deflect spray are permitted.

6.0 Masts. All mast sections will be rigged to a minimum configuration that agrees with the specifications of the plans. The mast material is open, but the mast section must comply with the measurements in the Plans Sheet 38 (relating to the height, chord, surface area, etc.).

6.1 Mast Connection Point. The mast must be connected to the deck in the location and/or manner specified in the plans.

7.0 Standing Rigging. The standing rigging shall be in accordance with the plans in terms of connection points and design. Material and size are specified in the Plans, Sheet 35. Top shroud chainplate can be moved inboard in float if wished.

8.0 Running Rigging. The running rigging shall be in accordance with the plans, but the plans allow for altered layouts and additional items including downhaul systems, barber haulers, preventers and additional sail control lines as long as the structural integrity of the boat is not compromised.

9.0 Deck Layout. The deck layout shall be in general accordance with the plans. Material and sources for these items are open, as long as the recommended design specifications are met.

("general accordance" = the deck layout is open, but follow the plans for load requirements)

9.1 Traveler. The main/jib traveler tracks must meet minimum load requirements per the plans and must be fixed in the general area specified by the plans. Traveler should be of straight type (versus curved).

10.0 Sail Measurement. The rig shall consist of Mainsail, Blade, Screecher and Asymmetric Spinnaker. A Storm Jib is optional. The IYRU Measurement Instructions (1993) shall apply where no conflict with these rules arises. Reinforcement patches are not restricted. Sail material is not restricted except that the spinnaker shall be nylon. The "triangulation" method shall be used if the width at the head shall be measured at right angles to the luff through the highest point of the sail on the luff, to the line of the leech, extended if necessary.

    1. BLADE
      1. The length of the luff shall not exceed 27.92 ft. The distance from the clew to the nearest point on the luff (L.P.) shall not exceed 9.2 ft.
      2. At the half leech point the nearest point on the luff shall not exceed 6 ft.
      3. Battens are not restricted.
      1. The length of the luff shall not exceed 32.7 ft. The distance from the clew to the nearest point of the luff (L.P.) shall not exceed 18.7 ft. Foot roach extending outside a straight line between the tack and clew shall not exceed 1.5 ft.
      2. Only one batten is allowed which shall be located on the foot and shall be not more than 3.75 ft.
      1. The head shall be the highest point of the sail projected perpendicular to the luff or its extension. The tack shall be the point of intersection of the line of the foot with the line of the a aft edge of the mast. The clew shall be the point of intersection of the line of the foot with the line of the leech.
      2. The foot, when smoothed out for measurement, shall be straight.
      3. Batten number is not limited.
      4. The distance from the clew to the tack (foot) shall not exceed 10.85 ft. The distance from the head to clew (leach) shall not exceed 36.2 ft. The head width measured at right angles to the luff shall not exceed 2.66 ft.
      5. The leech shall be straight or concave between batten pockets and form the top batten pocket to the head. Any hollows in the leech in the way of width measurement points shall be bridged with straight lines for measurement.
      6. At the 1/4, and 1/2 leech points, the nearest point on the luff shall not exceed 7 ft. and 9.5 ft. distant, respectively, measured to include the boltrope. The 1/4 leech point shall be found by folding the head to the 1/2 leech point and smoothing the sail flat.
      7. The mainsail shall be measure with the battens removed.
      1. The luff shall not exceed 39 ft. The leech shall not exceed 34 ft. The foot shall not exceed 26 ft. The distance from the half luff point to the half leech point (mid girth) shall not exceed 20.4 ft.
    1. STORM JIB
      1. Shall not exceed the dimensions of the Blade
      1. Once the sails are measured and found to be in accordance with these rules, the sails shall be legibly and permanently endorsed with the date of the measurement and measurer's identifying mark. New or substantially altered sails shall be measured by a recognized measurer.

10.1 Class Emblem. The class emblem as specified in the plans, together with the class hull number (and optional USSA registered sail number), shall be displayed on the mainsail, per size and placement specified in the plans.

11.0 Hiking and Balancing Systems. Outboard hiking/balancing systems are not allowed and the crew must be inboard at all times. The restricted systems include, but are not limited to, racks, Bermuda boards and trapezes. The use of water ballast systems is also not allowed during class events.

12.0 Interior Layout. The interior layout of the main hull is at the sole discretion of the owner, except the structural areas (i.e., V-berth, Beam bulkheads, etc.) and the addition of one Quarter berth. The interior must be painted, covered with fabric, or finished in some manner as to cover the carbon throughout the main cabin area within three months of launch.

13.0 Instruments & Electronics. Instruments and electronics selection and placement are at the sole discretion of the owner. Navigation lights must be per Coast Guard Regulations and shall be carried and operational at all times. Battery size my vary, but must be appropriate for the conditions. (60 amps should be considered minimum.)

14.0 Motor and Fuel. A minimum 4-hp motor must be in place ON THE TRANSOM and operational at all times. It shall be carried with ample fuel for the conditions.

15.0 Crew. There are no restrictions on crew number, age or weight, but the total weight must not exceed the Designer's load capacities. (Maximum 680 lb. on windward float)

16.0 Advertising. Advertising on the hull, floats, beams and sail is allowed and should be in accordance with the guidelines established by the USSA. Please note that individual events may require the placement of the event sponsor name(s), so in consideration of this, any owner's advertising may be covered.

17.0 Safety Equipment. The class does not mandate safety equipment per se, instead, the class rules dictate that safety equipment per Coast Guard Regulations must be in place and may be modified or amended by the governing body of each race (Race Committee). More importantly, the Class Association places the ultimate responsibility for the safety of the vessel and crew in the hands of the skipper in deciding which safety items to carry.

17.1 Emergency Hatch. An appropriate emergency hatch shall be located per the plans on the underside of the flange of the boat in the aft section of the cockpit. It should be equipped with items that are suitable for the occasion and shall meet Offshore Racing Council (ORC) recommendations as published by USSA.

18.0 Class Officers & Duties. The owners shall elect the following Class officers: Commodore, Vice Commodore, Secretary, Treasurer and Measurer. These officers are required to be current boat owners. Spouses of owners or associate members may also be elected to Class Officer positions and positions shall be of 24 months duration. In additions, Ian Farrier, C.C.I and MPG shall also actively participate in partnership with the Class. This entire entity will be called the F-25C Board of Directors and the Board of Directors is responsible for ensuring that the interests of the voting class members are represented from a democracy, safety, performance and economic perspective.

18.1 Commodore. The Commodore's primary responsibility is to oversee that the general direction of the Class organization fulfills the Class Charter and the Intent (Rule 1.0 & 1.1) with regards to the concerns of the owners themselves. The Commodore should also work in partnership with both the Designer and the Manufacturer with class information that may help these individuals market the boat with respect to the Class association.

18.2 Vice Commodore. The Vice Commodore's responsibility is to help the Commodore with his duties. These may include, but are not limited to, event scheduling/organizing, monitoring the Class rules for errors and omissions, representing the class at other forums (e.g. USSA), and filling in for any other officer in the case that he/she is unable to complete his/her respective duties.

18.3 Secretary. The Secretary shall be responsible for maintaining Class democracy, maintaining an accurate list of Class Association members, facilitating any voting process, publishing notes of Class information and overseeing a newsletter process.

18.4 Treasurer. The Treasurer shall be responsible for any monetary activities of the Class Association. The Treasurer shall report the status of these funds on a quarterly basis to the Class Officers and on an annual basis to the Class Association. Any accounting of these funds shall be consistent with generally accepted accounting principles (GAAP).

18.5 Measurer. The Measurer shall be responsible for maintaining all the required measurement specifications. The Measurer may also be required to help event organizers with boat measurement enforcement. The Measurer shall also maintain a list of all approved "variances" that are in effect.

18.6 Designer. The Designer shall be responsible for maintaining the structural and safety design of the boat. He shall be available as needed for design questions.

18.7 Manufacturer. The Manufacturer shall be responsible for building, marketing and selling kit boats, ensuring that the manufacturing quality is consistent and of a high standard, providing recommendations and specifications for all components of the boat and acting as a primary source for all materials needed for a builder to complete their boat. The Manufacturer will provide a newsletter and a hot line for all F-25C builders, ensuring accuracy and helpful building information.

18.7A MPG Marine will finance and work in full partnership with the Class Association until twenty F-25C's are floating. During the twenty-boat interim, MPG will add the Class newsletter to the Manufacturer's newsletter for distribution.

18.8 Terms. The terms of the Class Officer positions shall be for twenty-four months and shall correspond with the calendar year start and end dates. Election of Officers will take place each year in November. In December the newly elected officers will assume their duties. As a means of promoting continuity and an organized transfer of affairs to newly elected Officers, each annual election shall be for one half of the Officer's slate. Officer positions elected to Terms starting in even number years will be Commodore & Vice Commodore. Officer positions elected to Terms starting in odd numbered years will be Secretary, Treasurer and Measurer. Terms of office for the Designer and Licensed Manufacturer are open ended and need not be voted on by the Association membership.


To provide a smooth transition to the staggered election format, the elections held November 1997 will take the following form:

The Commodore and the Vice Commodore were be elected for a 12 month term.

The remaining three Officers (Secretary, Treasurer and Measurer) were be elected for a 24 month term.

Thereafter, the normal staggered election format will apply.

19.0 Grandfather Clause. The Board of Directors will review changes made by builders and approve or disapprove the applications for inclusion under the "grandfather" clause. The changes must be accompanied with photographs, engineering and/or drawings. Designer-approved "grandfathered" boats to abide by (and the decision be make by) Rule 1.1 (Intent). The deadline for this process will be ("May 1996"), after this date the "grandfather" clause will be closed for further changes.

20.0 Measurements. All references to Measurements will be per the F-25C Plans.

21.0 Minimum Weight. A minimum weight is to be determined by weighting all "race ready" F-25C's present at the 1996 Farrier Nationals, with the lowest weight boat to be the standard. Any future boats that weight less than this will need to have corrective weights added.






Last amended November 1997 


F-25C is a Trademark of Ian Farrier