ORCsy Certificate Sample

An ORCsy certificate provides a range of ratings, expressed as Time Allowances in s/NM for different wind conditions in the range of 6 – 20 knots of true wind speed for an optimum beat, and for 52, 60, 75, 90, 110, 120, 135, 150 degrees of true wind angle for an optimum run.

These time allowances are used in Performance Curve Scoring as a unique feature that is fundamentally different and much more precise than any other handicap system. It can rate different boats for different race conditions and course configurations by giving the boat’s theoretical predicted speeds for any wind condition and direction.

Time allowances for 7 wind speeds are also given for two pre-defined courses: Windward/Leeward is a conventional course where the race course consists of 50% upwind and 50% downwind legs, while the All Purpose course type includes equal distribution of all wind directions.

The yacht's rating in Time on Time (ToT) and Time on Distance (ToD) scoring methods are are shown here as generated by the ORCsy VPP in Light (TWS < 8 knots), Light-Moderate (8 <= TWS < 11 knots), Moderate (11 <= TWS < 14 knots) Moderate-Strong (14 <= TWS < 17 knots) and Strong (TWS >=17 knots). The rating used in a race is at the discretion of the Race Managers.

This section is showing the main Hull and Appendages measurements and hydrostatic calculations. Hull data includes the boat's primary characteristics while in measurement trim: Length overall, Maximum Beam, Draft and Displacement.

Main values used in the VPP calculations such as IMS L is shown followed by the Sink rate.

Stability calculations include Vertical Center of Gravity (VCG) in relation to the measurement waterline or hull offset file datum followed by the Righting moment (RM). Presence of the skeg or the trim tab is recorded.

Propeller data includes propeller installation (in aperture, strut drive or shaft) and type of propeller (solid, folding or feathering) followed by propeller diameter.

All measurements are shown for the Propeller and relevant installation together with Propeller Installation Projected Area (PIPA) as the main factor in calculating propeller resistance in the VPP calculations.

Each non-manual winch used for the spinnaker halyard and headsail sheet is recorded with its maximum power in kilowatts and maximum speed in meters per minute.

Frontal and lateral superstructure areas are recorded as the projected area taken above the highest points on each station in the hull offset file. Additionally, dome frontal areas are recorded.

The rig dimensions include the mast, boom, spinnaker pole, and/or bowsprit. The mast is measured for halyard heights P, IG, and ISP, as well as mast cross-sections MDT1, MDL1, MDT2, MDL2, TL, MW, and GO. 

This section includes all information about a boat's stability and freeboard measurements. Freeboards are measured on the port and starboard sides at freeboard points identified in the hull offset file at a specific distance from stem (SFFP and SAFP). Measured freeboards (FAM and FFM) are then adjusted to the standard water specific gravity from the measured specific gravity (SG) to calculate the freeboards (FA and FF) that are used to define the measurement waterline. This is then used to determine displacement, wetted surface and the complete set of the boat's hydrostatic data.

Inclining test data is shown from which the Righting Moment is calculated.

Measurement inventory is a record of all items on the boat during the flotation measurement. It is divided into two main sections: Tanks and Inventory.

This is the list of all the measured sails recorded for determining a boat's predicted speeds and ratings, and includes at a minimum the largest of each sail type in the inventory. Each sail's measurements, area, measurement date, name of measurer, manufacturer and material are shown for each of the following sail types: Mainsail, Headsails (set on the forestay and set flying), Symmetric spinnaker, Asymmetric spinnaker, and Mizzen and Mizzen staysail.