RAZOR SIDEMOUNT OPEN WATER DIVER
Learn the Razor Side-Mount System
This course covers all the core sidemount diving skills with a dedicated focus on the Razor system, the benchmark in sidemount gear. You’ll learn not only how to sidemount dive, but how to optimize the lightweight, minimalist design created by explorers for maximum comfort, balance, and control.
Designed for open water, the training builds the perfect foundation for future exploration. You’ll fine-tune buoyancy, trim, and situational awareness while mastering gear configuration and in-water control, whether your goal is to move into cave, wreck, or technical diving, or simply enjoy the freedom of sidemount on reefs and cenotes.
Prerequisites:
Required Certification:
Advanced Open Water
Minimum Age:
- 18 Years Old
- 25 Logged Dives
Why the Razor
Side-Mount Course?
This course teaches all the essential sidemount diving skills while placing a strong emphasis on the Razor Sidemount System, designed by explorers and trusted by divers worldwide. You won’t just learn how to sidemount dive, you’ll discover how to get the very best out of Razor’s lightweight, minimalist design to achieve smoother, safer, and more enjoyable dives.
And no, it's not just for cave diving.
Unlike traditional single-tank configurations, Razor gives you better balance, improved streamlining, independent gas supplies, and built-in buoyancy redundancy, making it safer and more versatile. It’s not just for cave divers, Razor is equally powerful in recreational open water diving, whether you’re exploring reefs, cenotes, or preparing for advanced diving.
CHOOSE THE RAZOR SIDEMOUNT SYSTEM AND TRANSFORM YOUR DIVING EXPERIENCE
What Skills
Will You Learn?
- Proper fitting and configuration of the Razor Side Mount System
- Equipment streamlining and attachment techniques
- Razor harness setup, BAT wing inflation, and T-weight system use
- Efficient tank setup and Bogaerthian regulator configuration
- Entry-level gas management and planning
- Valve management and gas volume awareness
- Propulsion techniques, including frog kick, helicopter turns, and back kick
- Horizontal trim control and hovering stability
- Removing and reattaching tanks underwater
- Basic problem-solving in open water scenarios
- Environmental awareness and conservation techniques
- Donning and doffing gear in water and on land
Technical Background
and Context of
Sidemount
- History of sidemount diving in Mexico and worldwide.
- Applications in cave and overhead environment diving.
- Emergency procedures and gas failure management.
- Psychological aspects of Sidemount in confined spaces.
- Safe team-based gas-sharing protocols.
Course Details

Duration:
Minimum 4 days, but we move at your pace. Take as much time as you need to feel confident.

Dives:
3 confined water sessions + 3 open water dives (minimum 120 minutes total bottom time)

Format:
Theory sessions, dry land drills, confined water skills, and guided open water dives

Certification:
Razor Sidemount Open Water Diver (GSM - Global Sidemount)
Training per day!
USD 325
- Transportation from Playa del Carmen, Puerto Aventuras and Tulum.
- Nitrox 32%
- Cenote entrance fees
- Water, lunch, and snacks
Razor Sidemount System
USD 889
Certification fee
USD 30
Certification fees are not included and must be paid separately once all performance requirements are met.
RELATED
COURSES
Yes, it’s technical. Yes, it’s demanding. But you’ve got to have fun!
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Take your first step into the overhead environment, master your mind, handle zero-visibility exits, and sharpen your skills with every dive.
Intro to Cave Diving
Go beyond the natural light zone and build the skills and discipline needed to progress from Cavern Diver to the TDI Full Cave Diver course.
TDI Full Cave Diver
RAZOR Sidemount
Cave Diver
Go beyond the open water and progress into Razor Sidemount Cave Diver. Develop cave-specific sidemount skills and master the gear configuration with a Razor Sidemount Cave Instructor.
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TDI Deco Procedures builds staged decompression planning, Advanced Nitrox gas-switching, and the foundation to progress into Extended Range and Trimix diving.