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.

Rig measurements include the mast, boom and spinnaker pole and/or bowsprit. Mast is measured for halyards heights (P, IG and ISP), mast cross sections (MDT1, MDL1, MDT2, MDL2, TL, MW and GO) and mast weight and center of gravity (MWT, MCG).

The boom is recorded for its length and height (E, BD) as well as its height above sheerline at the mast.(BAS)

Foretriangle base (J) together with the measurement of stem to forward end of J (SFJ) determines position of the mast and sail plan, while the spinnaker pole and/or bowsprit are recorded with appropriate measurements (SPL or TPS).

Mizzen rig measurements are shown for ketches and yawls and includes mizzen mast and boom with the same measurements as for a sloop rig plus the height of the mizzen staysail attachment and the distance between two masts.

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 Righting Moment is calculated.

For each non manual powered winch for spinnaker halyard and headsail sheet the maximum power in kW and maximum speed in metres/minute is recorded.

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

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

ORC Reference number is a unique number identifying that certificate and may be retrieved in the ORC database available at the ORC Sailor Services.

There is an issue date as well as a VPP version used together with the latest date for the validity of the certificate.  

A boat shall have only one valid certificate at any one time. The valid certificate is the last one issued.

ORC Certificates are valid for one year. This is because the VPP software calculations are updated yearly based on the ITC’s latest research of aero and hydrodynamics, as well as improvements made from analysis of race results and boat performance during the racing season, and submissions made from ORC Nominating Bodies.