Technical Diving International (TDI) was formed in 1994 by some of diving's most experienced instructors to bring technical applications of diving to a wider audience. TDI's training materials have become known as the industry's best and most professional resources. Most importantly, TDI has the best safety record of all training agencies. TDI has become the largest international specialized dive agency. Trawangan dive offers a variety of Nitrox, Trimix and Closed Circuit Rebreather (CCR) courses.

Courses	Price	Prerequisite	Time	Gas Cost	Equipment
Nitrox Diver (Theory Only) • 21-40% O2 • Max Depth 40m/130ft	$150	• Open Water or    enrolled in course • 15 years of age	5 Hours	Included	Included
Nitrox Diver • 21-40% O2 • Max Depth 40m/130ft	$230	• Open Water or enrolled in course • 15 years of age	1½ Days 2 Dives	Included	Included
Advanced Nitrox Diver (Single Tank Option) • 21-100% O2 • Max Depth 40m/130ft • 3x single tank dives •1x single tank dive with pony bottle	$250	• Basic Nitrox • 25 Dives • 15 years of age	2 Days 4 Dives	$35	Included
Advanced Nitrox Diver (Twin Tank Option) • 21-100% O2 • Max Depth 40m/130ft • 3x twin tank dives • 1x twin tank dive with pony bottle	$350	• Basic Nitrox • 25 Dives • 15 years of age	2 Days 4 Dives	$75	$25 per dive
Nitrox Diver & Advanced Nitrox Diver Combined (Single Tank Option)	$400	• Basic Nitrox • 25 Dives • 15 years of age	3 Days 4 Dives	$35	Included
Nitrox Diver & Advanced Nitrox Diver Combined (Twin Tank Option)	$500	• Basic Nitrox • 25 Dives • 15 years of age	3 Days 4 Dives	$75	$25 per dive
Decompression Procedures Diver (Air Single Tank Option) • Max Depth 45m/150ft	$250	• Open Water • 25 Dives • 18 years of age	2 Days 4 Dives	Included	Included
Decompression Procedures Diver (Nitrox Single Tank Option) • Max Depth 45m/150ft	$250	• Basic Nitrox • 25 Dives • 18 years of age	2 Days 4 Dives	$35	Included
Decompression Procedures Diver (Nitrox Twin Tank Option) • Max Depth 45m/150ft	$400	• Basic Nitrox • 25 Dives • 18 years of age	3 Days 4 Dives	$75	$25 per dive
Advanced Nitrox Diver & Decompression Procedures Diver Combined (Single Tank Option)	$450	• Basic Nitrox • 25 Dives • 18 years of age	3 Days 6 Dives	$50	Included
Advanced Nitrox Diver & Decompression Procedures Diver Combined (Twin Tank Option)	$700	• Basic Nitrox • 25 Dives • 18 years of age	4 Days 6 Dives	$115	$25 per dive
Extended Range Diver • Max Depth 55m/180ft	$700	• Advanced Nitrox & Deco Procedures or equivalent • 100 Dives with 25 dives over 30m • 18 years of age	5/6 Days 6 Dives	• $115 • Travel & Deco gas additional based on mix	$25 per dive
Extended Range & Decompression Procedures Diver Combined	$900	• Advanced Nitrox & Deco Procedures or equivalent • 100 Dives with 25 dives over 30m • 18 years of age	6/7 Days 8 Dives	$150	$25 per dive
Advanced Wreck Diver • Max Depth 55m/180ft	$700	• Advanced Open Water • Basic Wreck/Cavern Diver • 50 Dives • 18 years of age	5/6 Days 6 Dives	• $115 • Deco gas additional based on mix	$25 per dive
Trimix Diver • Normoxic 18% O2 or higher • Max Depth 60m/200ft	$700	• Advanced Nitrox & Deco Procedures • 100 Dives • 18 years of age	4 Days 4 Dives	• Approximately $60 per dive • Helium $0.06 per fill liter of gas	$25 per dive
Advanced Trimix Diver • Hypoxic 17% O2 or lower • Max Depth 100m/330ft	$1200	• Extended Range or Entry Level Trimix • 100 Dives with 25 dives over 30m • Logged Twin Tank Experience • 18 years of age	6/7 Days 6 Dives	• $100-$200 per dive depending on depth • Helium $0.06 per fill liter of gas	$25 per dive
Nitox Gas Blender	$250	18 years of age	1 Day	N/A	N/A
Advanced Gas Blender	$300	• Nitrox Gas Blender • 18 years of age	1 Day	N/A	N/A
O2 Service Technician	$300	• Nitrox Gas Blender • VIP Certification • Regulator Service Technician Cert. • Employed at a Scuba Diving Facility • 18 years of age	1 Day	N/A	N/A
Rebreather Courses	Price	Prerequisite	Time	Gas Cost	Equipment
Inspiration/Evolution Air Diluent - NO DECO Level 1 • Max Depth 30m/100ft	$1000	• Basic Nitrox • 20 Dives • 18 years of age	5 Days 7 Dives	• Sofnolime included if renting a Rebreather • Sofnolime $9.40 per kilogram	Buddy Evolution Rebreather rental $150 per day
Inspiration/Evolution Air Diluent - DECO Level 1 • Max Depth 45m/150ft	$1200	• Advanced Nitrox & Deco Procedures • 50 Dives • 18 years of age	5 Days 7 Dives	• Sofnolime included if renting a Rebreather • Sofnolime $9.40 per kilogram	Buddy Evolution Rebreather rental $150 per day
Inspiration/Evolution Mixed Gas CCR Diver - Level 2 • Max Depth 60m/200ft	$1200	• Minimum 50 rebreather hours • Over 50 hours, 50% must be deeper than 20m • 18 years of age	7 Days 6 Dives	• Sofnolime included if renting a Rebreather • Sofnolime $9.40 per kilogram • Helium $0.06 per fill liter of gas	Buddy Evolution Rebreather rental $150 per day
Inspiration/Evolution Advanced Trimix Diver - Level 2 • Max Depth 100m/330ft	$1300	• Minimum 100 rebreather hours • Over 100 hours, 50% must be deeper than 30m • 18 years of age	8 Days 7 Dives	• Sofnolime included if renting a Rebreather • Sofnolime $9.40 per kilogram • Helium $0.06 per fill liter of gas	Buddy Evolution Rebreather rental $150 per day
Private Instruction with Simon Liddiard on all courses	$100 per day	N/A	N/A	N/A	N/A