Forget using GPS altitude only instruments at category 1
competitions

http://www.fai.org/civl-news/39241-2015-plenary-whats-up

Scoring, tracklogs, GPS – Livetracking logs can be used for
scoring. Flight recording device not registering barometric altitude are
forbidden. Altitude evaluation to be based on barometric altitude.

Hang gliding – The PG leading coefficient is now applied to HG.