IRC YEARBOOK 2010
13 MEASUREMENT AND COMPLIANCE 17.2.4 Anchors, chains, warps, mooring lines and fenders.
13.1 Measurement data shall be obtained by direct measurement or 17.2.5 Clothing, bedding and personal effects.
derived from another rating certificate, whenever possible. 17.2.6 All removable safety equipment.
13.2 Measurements shall be taken in accordance with ERS Part III, 17.2.7 Tools and spare parts.
Measurement Rules. 17.2.8 Loose gear.
13.3 The accuracy of measurements supplied shall be the owner’s 17.2.9 Crew.
responsibility. An IRC measurement service is available on 17.3 When for practical reasons it is not possible to remove all items and
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application to the Rating Authority or a boat’s Rule Authority. equipment (e.g. fuel), it is acceptable to deduct the weight of these
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13.4 It is a breach of the Rules of IRC for any owner or individual to from the gross weight. The rating authority reserves the right to
intentionally supply false information. Attention is drawn to Rule 8.7
refuse such data when inadequate detail is supplied.
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and to RRS 69, Allegations of Gross Misconduct. 17.4 The Rating Authority will calculate the boat weight of an un- U
13.5 The Rating Authority will use the supplied data as a basis for rating weighed boat based on information contained on another rating
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but reserves the right to overrule specific data or to standardise the certificate, designer data or from any other source.
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dimensions of a class of production boats. 17.5 In the absence of other information, boat weight may be calculated
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13.6 The Rating Authority or a boat’s Rule Authority may require by deduction of the items detailed by Rule 17.2 from a boat’s sailing
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a boat to be submitted for measurement at any time without displacement or sailing weight.
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giving reasons. Measurement will be undertaken by authorised
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measurers of the Rating Authority. A new certificate will be issued
18 WATERLINE LENGTH (LWP) AND DRAFT
by the Rating Authority based on the new measurement data.
18.1 Measurements shall be taken with the boat in measurement
13.7 In the particular case of a boat issued with a one-design certificate,
condition. The measurement points for various configurations
as noted on the certificate, the rating requires compliance with
of boats are shown on the diagrams for hull shapes and are
one-design class rules. In the event of conflict, IRC Rules shall take
defined in Appendix 1. The dimension y shall also be supplied and
precedence. See also Rule 22.4.2.
dimensions h and x if appropriate. In the case of doubt, LH and LWP
shall be maximised.
14 SAIL NUMBERS
18.2 Overhang Factor (OF) is an assessment by the Rating Authority of
14.1 Each boat shall hold a sail number as prescribed by its Member
the bow and stern overhangs of the boat and their contribution to
National Authority. Sail numbers shall be displayed in accordance
sailing length.
with RRS 77, Identification on Sails. This Rule may be amended by
Notice of Race.
19 HULL APPENDAGES
15 MANUAL POWER
19.1 Full details of a boat’s hull appendages shall be supplied to the
15.1 RRS 52, Manual Power, and ERS B.5 shall not apply. This Rule
Rating Authority at the time of rating application.
may be amended by Notice of Race.
19.2 Any keel fin fairings with a nominal density, including any cavities
15.2 (a) The use of stored power for the hoisting of mainsails, or the
and/or core material, significantly lower than the main structural
reefing or furling of sails need not be declared.
elements of the keel fin shall be declared. For the purpose of this
(b) Boats using stored power solely for the adjustment or
rule, a keel fin fairing does not include surface fairing, filling and
operation of backstays shall declare this to the Rating
painting materials up to a total thickness of 10 mm, measured
Authority.
normal to the local surface of the keel fin.
(c) Boats using stored power for the adjustment or operation
19.3 Drop keels, centreboards, bilgeboards and other movable hull
of running rigging other than as noted in Rules 15.2(a) &
appendages shall be declared. Unless fixed down while racing,
(b) shall declare this to the Rating Authority.
drop keels will be rated as movable hull appendages.
.
19.4 In the construction of hull appendages, no material with specific
Part C IRC, advertising permitted
gravity greater than 11.3 is permitted.
19.5 Boats including material in their hull appendages with specific
16 ADVERTISING
gravity greater than 11.3, and with Age Date of 2005 or earlier, and
16.1 Advertising may be displayed in accordance with ISAF Regulation
holding a valid IRC certificate on 31st December 2005 are exempt
20, Advertising Code.
from Rule 19.4. Apart from routine maintenance, any such boat
changing the quantity of material of specific gravity greater than
17 BOAT WEIGHT
11.3 shall comply with Rule 19.4 and will not subsequently be
eligible for exemption from compliance with Rule 19.4.
17.1 Boat Weight is measured in the following measurement condition:
17.1.1 Dry.
17.1.2 Fully rigged with all spars (including spinnaker pole(s)
20 ENGINE AND PROPELLER
and jockey pole (if any)), standing rigging, backstay,
20.1 Boats will be rated with either:
running backstays and checkstays, halyards, mainsail
20.1.1 No engine.
and mizzen sheets, and vang(s).
20.1.2 Outboard engine (i.e. an engine where the propeller may be
17.1.3 Main engine installed, or outboard engine aboard in stowed
removed from the water while racing).
position.
20.1.3 Inboard engine, including strut drive and stern-drive
17.1.4 Batteries and fitted berth cushions on board in their normal
configurations. Propeller type shall be declared at the time
positions if carried while racing. These items will be noted
of rating application.
on the boat’s certificate.
20.2 Inboard engines shall be capable of producing a minimum speed of
17.1.5 All permanent fixtures and fittings and items of accom-
1.8*LWP^0.5 knots. Outboard engines shall be securely fastened
modation whether detachable or not, including wash-
in their normal stowage positions for racing.
boards, bunk and floorboards and saloon table (if fitted for
racing) on board in their normal positions. 21 RIG AND SAILS
17.1.6 Standard fit out if rated to class standard data. 21.1 General
17.2 The following items shall not be on board for measurement condition: 21.1.1 Single and twin masted rigs only may be rated under IRC.
17.2.1 Sails, headsail and spinnaker sheets and spinnaker 21.1.2 ‘Cat’ rig is defined as a rig where no sails are set forward of
guys, spare standing rigging and running rigging. the mast(s) when sailing to windward.
17.2.2 Fuel, water and the contents of any other tanks. Gas bottles 21.1.3 'Gaff’ rig includes square, spritsail and other similar rig
shall be removed. configurations.
17.2.3 Food, cooking and catering utensils. 21.1.4 Mizzen staysails shall be declared.
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