The TDI Extended Range Diver course is your invitation to explore the ocean beyond recreational limits — a world of silent wrecks, untouched reefs, and true adventure.
Designed for serious divers who want to go deep using open circuit equipment, this course builds the skills, discipline, and confidence to plan and execute dives to 55 metres  using air or nitrox as bottom gas and accelerated decompression.

Our course is seven dives. Unlike other agencies ‘extended range’ courses, you’ll be doing seven dives : two dives in the 30m range and then five dives between 45~55m. 

Adventure Meets Simplicity

Unlike rebreathers, extended range open-circuit diving keeps things simple. No electronics, no complex maintenance, and no high costs. It’s about mastery of fundamentals — gas management, redundancy, and solid technique — so you can focus on what really matters: exploration.

The Training Environment

Frontier Tech Divers offers the perfect classroom for deep diving — with immediate access to deep walls and wrecks right in front of the dive center, off Panglao. Our instructors are among the most experienced TDI professionals in the Philippines