https://www.fai.org/sites/default/files/documents/annexe_26b_-_proposal_hgpg_committee_xc_distance_measurements_and_tolerances.pdf

In Hang Gliding and Paragliding. Proposal:

In S7A - XC CIVL GAP – 8. 1.1 Reaching a turnpoint cylinder

For Cat 1, set the tolerance to 0.1% .

For Cat 2, recommend a tolerance of 0.5% to allow pilots to still use equipment
that calculates distances on the FAI sphere

Recommendation :

To continue analysing actual turnpoint errors, and potential turnpoint errors at
lower tolerances .