David Apperley is an Australian technical diver and cave explorer. Apperley holds instructor levels in cave diving, Deep Mixed Gas Diving and Deep Closed Circuit Rebreather Diving and was the expedition co-ordinator for the Pearse Resurgence Project 1996–2003. He was the project leader on the Royal Mail Ship Niagara 2003 Survey Project, which involved the organization and planning of putting some of the world's most experienced divers onto the 130-metre-deep Niagara wreck site, off the North Island of New Zealand.