I liked the image stability when you were deep in the cave! Either the precision image sensors were doing a great job, or you’re very steady at the controls in ATTI mode, because I can’t imagine you had GPS lock in there.
The excavations in Kozarnika cave near the village of Oreshec, Belogradchik municipality, have been going on for 16 years now. They have been executed by a joint Bulgarian-French research team. Each year the archeologists are going deeper...