ORC Multihulls

Using the experience of over 30 years of development of the ORC rating systems for the monohulls through the ORC International and ORC Club certificates, and in the last several years the widely used ORC Superyacht rating rule, ORC now offers the ORC Multihull rating system for any type of catamaran or trimaran.
The measuring processes are the same as those of monohulls. The geometry of the hulls, superstructure, and appendages are captured in the hull offset file, which can be based on physical scanning or verified designer CAD files. The Offset file format accommodates a variety of different appendage types, such as curved foils or retractable boards. Rig measurements also follow the established monohull principles recognising also multiple foretriangles that are typical for multihulls. Sail measurements follow the World Sailing Equipment Rules of Sailing (ERS). Additionally, propeller measurements are taken also following already established procedures and protocols. The detailed ORCmh Rules and VPP Documentation will be published in due course.

Just as with any other ORC certificate, ORCmh certificates provide 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 a complete variety of wind angles.

Additionally, simple scoring options with single number Time on Time or Time on Distance coefficients are given also for the Windward/Leeward and All-purpose course model. Using a complete table of time allowances for different wind speeds and angles a custom single number scoring may be calculated for each specific race using historical wind data or weather forecast prior to the race.

During this development phase, ORCmh certificates will be issued by the ORC Central Rating Office. This will be extended to the National Rating Offices as the system further evolves.

For any inquiries about ORCmh or requests for a test certificate, please email mh@orc.org

Multihull Events
Sort the event by…

Date Title Place Country Class Results
Porto Cervo
ITA
ORC SY, ORC MH
Results
Auckland
NZL New Zealand
ORC SY, ORC MH
Results
Porto Cervo
ITA Italy
ORC SY, ORC MH
Results
Multihull Cup 2024
Multihull Events
Mallorca
ESP Spain
ORC MH
Results
Multihull Cup 2025
Multihull Events
Mallorca
ESP Spain
ORC MH
  • Il Gunboat 66 Gaetana di Riccardo Pavoncelli ha vinto la classe Multiscafi

    Gunboat 66 GAETANA - Maxi Yacht Rolex Cup 2024 © Carlo Borlenghi

  • Multihull Cup 2024 © Sailing Energy

    Multihull Cup 2024 © Sailing Energy

  • 18 5 metre performance sailing catamaran CATION

    18.5 m CATION

  • 220826 SE MULTIHULLCUP 22 413075 8167

    Multihull Cup 2022 © Sailing Energy

  • 220826 SE MULTIHULLCUP 22 413165 0863

    Multihull Cup 2022 © Sailing Energy

  • 220826 SE MULTIHULLCUP 22 413445 0200

    Multihull Cup 2022 © Sailing Energy

  • Allegra winner of the day in the Multihull Class Maxi Yacht Rolex Cup 2023 Photo credit Rolex Carlo Borlenghi

    Allegra - Maxi Yacht Rolex Cup 2023 © Carlo Borlenghi

  • Maxi Yacht Rolex Cup Day 3 AT 0702

    Maxi Yacht Rolex Cup 2023 © Carlo Borlenghi

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