Interpretations of the Chief Measurer
1. Hull and Deck Dimensions Adopted: Prior to 10-Mar-91
Measurement of boat dimensions are taken from the imaginary intersection of the hull and deck (where applicable). Rub rails are specifically excluded.
2. Sail Measurement Points Adopted: Prior to 10-Mar-91
Revised: January 1994
For purposes of sail measurement, the tack, clew, and head are taken at the imaginary intersection of the sail edges. For example, the head of the sail is found by extending the luff and the leech until the extensions cross, independent of the halyard attachment eye. The extension lines can be thought of as infinite lines that touch the edge of the sail at two or more points. The extension lines must enclose all ropes and tapes. If multiple lines can be constructed, the lines shall be used which result in the shortest luff, leech, or foot measurement.
The only exceptions to this are noted in Interpretation 3 below.
3. Mainsail Measurement Points Adopted: Prior to 10-Mar-91
For purposes of measuring the luff of the mainsail, the two edges extended to determine the head are the top of the headboard and the luff. For purposes of measuring the leech of the mainsail and determining the mid girth point, the two edges extended to determine the head are the top of the headboard and the leech.
4. Allowable Equipment When Weighed Adopted: Prior to 10-Mar-91
To weigh a boat, the following equipment may be included, but must, if included during the weighing, be on the boat whenever she is racing:
-
- spinnaker pole
-
- whisker pole
-
- spinnaker sheets
-
- jib sheets
-
- main sheet
5. Spinnaker Hoist Measurement Adopted: Prior to 10-Mar-91
For purpose of measuring the spinnaker hoist, the measurement shall be taken from the deck to the bottom of the sheave that turns the halyard.
6. Jib Foot Roach Measurement Adopted: November 1991
For measurement of the jib foot roach in Article V Section 1, the sail may be flaked once above the line connecting the tack and clew.
7. Deck and Hull Construction Methods Adopted: February 1993
In order to avoid presentation in detail of the proposed construction methods and materials prior to construction, a deck must meet the following specifications:
Material : Solid Wood 7/16″
Deck Beams: 1″ x 2″ Spruce at 12″ intervals
8. Hollows Revised: 14-Mar-94
A hollow in the edge of a sail between adjacent batten pockets, the head point and adjacent batten pocket, or the clew point and adjacent batten pocket at a measurement point shall be bridged by a straight line and the measurement taken through the measurement point to the bridging line.
9. Batten Positions Adopted: 14-Mar-94
The batten lengths are specified in Section 2 of Article V Sails. The battens may be positioned anywhere on the leech of the sail and still “be of the type as shown on the plans”.
10. Clew Plate Adopted: 30-Apr-94
The clew attachment of the jib may be a single grommet or a clew plate with multiple attachment points. Clew plates are subject to the following limitations:
1. Not more than six inches in any direction;
2. Does not alter the clew measurement point;
3. Does not add to the foot roach that the sail supports; and
4. Does not alter the curve of the leech by functioning as a batten.
11. Deck and Hull Repair Adopted: 15-Jan-95
Revised: 16-Nov-2002
Although new fiberglass decks must come from an approved builder, any person can repair a fiberglass deck to approximately its original appearance and shape. Persons contemplating more than simple repair must seek the prior approval of the Chief Measurer and describe the nature and method of the repair completely. The repair must meet the following minimum requirements:
-
- After repair, the hull and deck must be capable of fitting back into its original mold, i.e. the repair must not modify the shape on the outer (gelcoat) side in such a way as to interfere with the body of the mold;
-
- After repair, the boat must contain at least the amount of flotation as when it was built. If foam has been removed after the original manufacturing date, it must be replaced at this time;
-
- The materials used in the repair must be equal to or greater than the original materials in weight, thickness, and strength; and
-
- The interface between the repaired area and the original deck must be carefully sealed to avoid water intrusion into the core of the deck or hull.
-
- After repair, the hull and deck must be capable of fitting back into its original mold, i.e. the repair must not modify the shape on the outer (gelcoat) side in such a way as to interfere with the body of the mold;
12. Spinnaker Block Adopted: 05-May-2001
The spinnaker block must be mounted to the front of the mast without any attempt to extend.
13. Spar Extrusions Adopted 27-Nov-04
Spar extrusions may not be cut away, other than openings just sufficient for through-fittings, at any point inboard of the outer edge of the racing bands.
14. Deck Material or Static Equipment Adopted 12-Feb-05
Material and/or static equipment which is affixed to the deck during racing is part of the deck for purposes of Specifications Article III, Section 9 Deck Requirements.
15. Jib Foot Cords Adopted -Feb-05
Material and/or static equipment which is affixed to the deck during racing is part of the deck for purposes of Specifications Article III, Section 9 Deck Requirements.
16. Boom Vang Adopted -Ap-07
A boom vang is shown in the Official Plans and is not “rigging made purposely to bend (the spars)” within the meaning of Paragraph 2 Boom of Article IV Spars and Rigging of the ISCA Specifications.
17. Chine Radius Adopted 26-Jan-19
15. Chine Radius: The ¼” radius specification of “detail X” on sheet six of the plans is interpreted as the minimum radius of any hull or transom chine.
18. Electronic Compasses Adopted 26-Jan-19
Currently, the Micro Compass by Raymarine (formerly known as the TackTick Micro Compass) and Prism by Velocitek comply with Section 14d of Article III of the Specifications and are allowed while racing.