▲PPENDIX 1 IRC Me▲surement Definitions ▲nd ▲bbrevi▲tions
Measurement Note World Sailing Equipment Rules of Sailing (ERS) Part II, Definitions, shall apply to measurement except as stated by IRC Rules or this Appendix. Measurements shall be taken in accordance with ERS Part III, Measurement Rules, Section H.
Terminology
A term used in its defined sense is printed in “bold” type if defined in the ERS. Any abbreviation given below is used in IRC Rules in its defined term unless specified otherwise.
MISCELLANEOUS
Series Date – The date on which the first boat of the design or the production series was first launched, whichever is earlier. Series Date does not change if the boat is modified.
Age Date – The date on which the boat was first launched, or the date on which the boat was re-launched following any hull shell modification, excluding the transom, whichever is the later.
Hull Shell – The hull shell excluding all of the following: any transom, the deck, any superstructure, the internal structure including any cockpit, fittings associated with these parts and any corrector weights.
Measurement Condition – As defined by Rule 17.1. Stored Power – Power other than power provided by the crew. Rating Authority – As defined in Rule 4.1. Rule Authority – As defined in Rule 4.1. RORC – The Royal Ocean Racing Club UNCL – L’Union National pour la Course au Large.
HULL AND APPENDAGES LH – Hull Length.
BO – The longitudinal distance between the foremost point on the hull and the foremost point of the waterline.
x – The horizontal distance between the waterline and the lowest point on the stem at a tangent of 45° to the longitudinal axis
h – The vertical distance between the waterplane and the lowest point on the stem at a tangent of 45° to the longitudinal axis.
SO – The longitudinal distance between the aftmost point on the hull and the aftmost point of the waterline.
y – The vertical distance between the aftmost point on the hull and the waterplane. In the case of a counter stern, the vertical distance between the aftmost point on the hull below the transom projected to the line of the aftmost point of the hull, and the waterplane.
LWP – Waterline length. (LH – BO – SO).
Wingspan – The maximum horizontal width in any transverse section of any wings attached to any hull appendage. Bulb Weight – The weight of the Bulb.
STERN OVERHANGS STERN OVERHANGS y Waterplane Skeg SO SO SPADE/SKEG RUDDER TRADITIONAL TRANSOM HUNG RUDDER
Waterplane y
y y Waterplane
SO MODERN TRANSOM HUNG RUDDER
Waterplane SO TRADITIONAL COUNTER STERN
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