Is this required to get the IGS13 to work? If so, where are these exactly suppose to go?

Thanks,

Ken S

This coming Saturday between 13:00-18:00z, HONG KONG VACC is hosting an on-line event for the 10th Anniversary of the closing of Kai Tak, Hong Kong VACC presents an official International flyin event to reborn the most famous fantastic IGS approach on this coming Saturday. Kai Tak (VHHX) and Chek La...