3 Class limits

3.1 Rating bands shall be reviewed each November for application the following January 1.

3.2 The annual band will be recommended by the International Technical Committee and approved by the ORC through the Offshore Classes & Events Committee.

3.3 General class limits for 2009 are:

3.4 Series production yachts

a) To qualify as a series production yacht, not less than the number specified in paragraph 3.3 above, for each individual class, shall have been launched and eligible to have been issued an Age Date and a common Series Date in accordance with IMS A2.2 and A2.3 at least two weeks prior to the first day of Inspection for the event for which a yacht of the series is seeking entry.

b) Deck and interior mouldings shall also comply with the intent of IMS A2.3. Mouldings may be multiple, provided both hull and deck are of identical design. Male plug constructions will be accepted only for the prototype of a production series.

c) Appendage modifications that would require a different OFF file will be deemed as a new series, including the requirement of a minimum number of boats specified in paragraph 3.3 above with the same appendages.

d) Modification or personalization of deck hardware is permitted. Modifications to the standard deck or deck mould are not permitted.

e) The requirements of a, b and c above are waived for boats with an Age Date of six years earlier than the year of the event

3.5 The number of crew necessary to qualify must be rounded up if it is a fractional number.

4 Additional class requirements

4.2 ORC Sportboat

a) Displacement in Measurement Trim shall be less than 2000 kg.

b) A yacht ’s displacement/length ratio in Measurement Trim (DSPM/LSM0^3) shall be less than 4.50.

c) Platforms capable of extension beyond the IMS sheerline which would permit any shift of crew weight outboard, trapezes and hiking straps are allowed for boats without lifelines at the sides of the cockpit. These features have to be rated following these formulae:

• Trapezes: CEXT = (1.2 * No. Tr. + 0.5 * No. Hk.) / No. Crew
• Hiking Straps: CEXT = 0.5 * No. Hk. / No. Crew

Crews of boats without trapezes or hiking straps shall keep their torsos within the sheerline (see RRS 49.2 and ISAF case 36). Tension of lifelines shall comply with Special Regulations 3.14.2 while racing. In the case of a yacht of a class for which published class rules specifically permit loose lifelines and the yacht complies with her class rules and wishes not to comply with SR 3.14.2, then Crew Extension (CEXT) shall recorded as 0.5 for any event in which these ORC Sportboat Class Rules apply.

d) Compliance is required with the Special Regulations Category 5 unless otherwise specified in the Notice of Race and/or Sailing Instructions.

e) If an outboard engine is on board during measurement (following One Design Class Rules or individually) this has to be mentioned on the Measurement Certificate and this outboard engine has to be stowed in its measured position during races.

f) The maximum number of sails carried on board shall be:

• 1 mainsail, 2 genoas, 1 jib (3 for boats without genoas), 1 storm jib, 2 spinnakers.

g) All sportboats shall be categorized in Performance category.

h) The rated upper Limit of Positive Stability shall be not less than 90.0 degrees.

i) For non-series-produced yachts, the certificates must be based on full IMS measurement.

For series-produced yachts, the certificate must be based on a full IMS measurement of at least one of the production series.

j) Any modification from a standard One-Design Class certificate shall require measurement by a Certified Measurer.