Slow flying indoor rc planes
The appropriate flag is waved in a circle, then a c ategory 1 or 2 signal is made. CATEGORY 1 OFFENCE. First circle with the red/blue flag. The flags are crossed and extended with the arms straight. Red flag in front for Aka, blue flag in front for Ao. CATEGORY 2 OFFENCE. The j udge points the red/blue flag with arm bent.