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ORC Rating Systems ORC International ORC Club

ORC Rating Systems ORC International ORC Club. Why do we need rating system? To allow boats of different sizes and characteristics to race each other with an equal chance to win. What is an ideal rating system?

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ORC Rating Systems ORC International ORC Club

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  1. ORC Rating Systems ORC InternationalORC Club

  2. Why do we need rating system? To allow boats of different sizes and characteristics to race each other with an equal chance to win.

  3. Whatisan ideal rating system? • fair to all boats, from cruisers to racers, with no strong typeforms in design • open, transparent and freely available • have rules that are objective, non-biased and open to input • have ratings that are simple, but accurate • have flexible scoring options for use with different course types • easy to use and understand • locally managed but available world wide

  4. ORC usesscience • Measurementofthehullwithappendages, propeller, stability, rigandsails • Complete set ofmeasurementis input to the VPP – VelocityPrediction Program • VPP isgivingtheoreticalboatspeedsinvarious wind conditions, complete set ofpolardiagrams for 7 differentrue wind sppeeds (6-8-10-12-14-16-20 kn) for allcomplete wind anglesincluding VMG beat andrun • VPP isupdatedyearlybythe International TechnicalCommittee (ITC) composedofwellknownyachtdesignersandnavalarchitectureexperts • More than 72.000 certificate dana issuedworldwideinlast 20 years for boatsrangingfrom 18 to 130 feetincluding standard procuctionboats, customboatsandprototypes, one design offshoreclasses, classicorvintageboats

  5. VPP (Velocity Prediction Program) Rating ORC-Int/Club certificates AERODYNAMIC MODEL (Drive) • Rig and sails IMS Measurement IMS Rule ORC Rating Systems ORC Rating Rules • Hull and propeller HYDRODYNAMIC MODEL (Drag) • Stability and freeboards

  6. ORC isnottype-forming • The ORC rating systemsdoesnotcomparethecharacteristicsof one boat to another • Itmeasures how a racingcrewcanreachtheirboat’stheoreticalperformancepotential.  The closer the crew is to those speeds, the better results they will get. • Results of the ORC World and European Championships in last few years have shown that a diversity of boat types, sizes and characteristics were among top 10 in the final results, with very small differences in corrected timesincludingseveraltiesincorrectedtimes

  7. ORC World Championship 2013 – Class A

  8. ORC World Championship 2013 – Class B

  9. Easterregatta 2014

  10. ORC is transparent • No secret factors, everything is calculated and documented • Complete descriptions of the VPP other formulations available • ORC VPP software is available for purchase for any yacht designer, boat owner or sailor interested in detailed use of the system. • ORC SailorsServices • free copies of any ORC certificate issued in the last 4 years. • for a small fee, test certificates can be issued on any measured boat in the system. • rating optimizations can be performed by making changes in the measurement test file to the rig, sails or crew weight and running a test certificate to explore their effects on rating. • use of the ORC Speed Guide gives an even more accurate look at the performance of the boat

  11. ORC isobjective • ORC Rating Systems are based on scienceandcompleteboatmeasurement • Thereis no guessingorsubjectiveelements • VPP isupdatedyearly to followtrendsinyacht design andcoveranypossibleloophole • Sailors can have input for rule changes through their ORC Nominating Body, which is the national offshore class association or other entity recognized by the national sailing federation • Based on the number of certificates issued during the year, countries are eligible to seats in the Congress, the main body accepting submissions based on recommendations by appropriate committees.

  12. ORC International isaccurate • ORC Club issimple • Twotypesofcertificates:ORC International and ORC Clubare fullycompatiblebothusing same ORC VPP andthe same methodofcalculations • For ORC Internationalboathas to becompletelymeasuredunder IMS • ORC Club certificate may be issued with less than complete IMS measurements, in cases where measurement data may be: • Measured in accordance with the IMS • Declared by the owner. Any declared data may be taken or corrected by the Rating Authority if there is reasonable doubt about any declared data. • Obtained from any other source, including photos, drawings, designs, data from identical or similar boats.

  13. ORC International isaccurate • ORC Club issimple • ORC Internationalis a complete measurement rule and it is applied in all countries at the same level • ORC Club is administered locally where each country may decide the level of measurement needed • ORC International is intended for use on World, Continental, Regional and National level as well as major international offshore races • ORC Club is as its name implies designed for Club-level racing that can go up to national championship level. • Both systems having the same rating and scoring options and can be scored together in any races • Of course, due to better quality of measurement data, ORC Internationalcertificates will be more accurate and give more favorable ratings.

  14. ORC International certificate Page 1 Page 2 Page 3

  15. ORC Club certificate

  16. ORC isflexible • One of main advantages of the ORC Rating Systems is the variety of scoring options • Scoring options offered include • the most sophisticated, where the boat's performance is taken in consideration depending on the wind conditions, or • simple scoring options using single number scoring coefficients in either  • Time on Time • Time on Distance • Performance line as a combination of Time on Time and Time on Distance • Triple numberwith three different Time on Time coefficients to be used in light, medium and heavy breezes. • All simple scoring options are also given for either Inshore (windward-leeward) or Offshore races. • The factors race managers should consider when choosing which scoring type to use include: • type and level of the fleet, the difference between fastest and slowest boat, prevailing weather condition, tradition of particular scoringtype, is there current in the area

  17. Simplescoringoptions • Time on Distance • Corrected time = Elapsed time – (ToD * courselength) • Time on Time • Corrected time = ToT * Elapsed time • Performance line • Corrected time = PLT * Elapsed time – PLD * Courselength • Triplenumber • Corrected time = ToT (low, medium, high) * Elapsed time • Low Range (less or equal 9 knots) • Medium Range (between 9 & 14 knots) • High Range (greater or equal 14 knots)

  18. PerformanceCurveScoring • The most powerful engine of the ORC International (ORCi) rating system. • Unique feature which makes this rule fundamentally different from any other handicap system, as it recognizes that yachts of varied design perform differently when conditions change. • Yachts of different designs will have different time allowances in each race depending on the weather conditions and the course configuration for that particular race. • For example, heavy under-canvassed boats are slow in light airs but fast in strong winds, boats with deep keels go well to windward, and light boats with small keels will go fast downwind. • Input values for PerformanceCurveScoring are for eachleg: • Length • Compassbearing • Wind direction • Completeexplanationisavailable at www.orc.org/pcs

  19. ORC iseasy to use • Both ORC International and ORC Club certificates contain a scaled boat drawing with all rig and sails measurements, which makes it easy to review. • Data of all certificates issued worldwide are available on the ORC Database website in the form ofRMS files used by different scoring software. • Altura scoring software is available free on this website, as well as RMS files updated automatically • It’s easy to get an ORC Club certificate: On-line ORC Club On-line applicationform.

  20. ORC isthinkinglocallyandactingglobally • National Rating Offices have several functions, including supervising the measurement and rating of yachts, supporting ORC racing by administering to their national fleets, and issuing ORC certificates. • For countries where a National Rating Office is not yet established, the central ORC Rating office can give support by issuing certificates. • ORC certificates are valid throughout the world regardless of where they are issued.

  21. ORC Sailor Service www.orc.org/sailorservices

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