Boats & Polars

Polars & Performance

Below is a collection of polar diagram from various sources.

Mostly in numerical format to easily plug into routing software. They’re published here just to play around with. For serious/real use you should get a real one for your specific boat. Also some links to tuning guides and other perfomance related info. Share and enjoy!

Various sources for IMS ratings with VPP-data:

Just for reference I collected a bunch if IMS certificates here.

I also collected lots of IRC numbers, just for reference. Sorted by boat type and sorted by Time Corrector (TCC).

Pelle Lindell did some excellent comparisons between LYS, IRC, IMS, ORC Club and PHRF: “Käpp eller rullator, handikapp för seglare – En jämförelse av olika handikappsystem” + spreadsheet.

Various sources on trim/tuning (Swedish):

Various polars from