Please tell us about your boat:
In order to answer the following questions you will need to know the configuration and dimensions of your boat and its sails.
- "J" is the base of the foretriangle measured along the deck from the headstay to the mast.
- "I" is measured along the front of mast from the highest halyard to the main deck.
- "LP" is the the shortest, or perpendicular, distance from the clew to the luff of the sail.
- "Jib Size (%)" is the length of your Jib's LP (Luff Perpendicular) expressed as a % of your boat's "J" dimension
If you don't know how to calculate your PHRF rating, leave "Proposed PHRF" blank and we will help you once we have all the other information about your boat. Base ratings and adjustments for all GSC boats link: https://docs.google.com/spreadsheets/d/1ACUnYUkWxwxhcBzy_AKTBFqvrEr1FvXGziPzlWW2f08/edit?usp=sharing