TDI Advanced Wreck

Day 2: Advanced Land Drills & Open Water Transition

Day 2 builds directly on your initial skills, moving from shallow mechanics to real-world application. Today, we focus heavily on pre-dive accountability, technical team drills, and transitioning your line work to the marine environment.

Morning: Dive Planning & Precision Land Drills

We kick off the morning at the beachfront restaurant to continue your technical academics and make any necessary adjustments to your equipment harness based on yesterday’s sessions.

Before heading to the boat, the team transitions to critical practical and dry-land drills:

• Primary Line Laying: Perfecting the physical mechanics of team line deployments, tie-offs, and wrap placements on land.

• Technical Dive Planning: Calculating strict gas matching schedules, Rule of Thirds/Sixths boundaries, and runtime protocols.

• Gas Analysis: Personally testing and logging all cylinder contents, confirming oxygen percentages, and labeling your maximum operating depths (MOD) if executing decompression profiles.

Afternoon: Open Water Skills Application SHallow skills

Following a lunch break, we board the boat to put your dry drills into practice in the open ocean. These dives focus on mastering your technical safety protocols directly along the exterior of the wreck site.

Under the direct evaluation of your instructor, you will execute:

• Real-World Guideline Mechanics: Laying and retrieving primary lines along an actual structure while maintaining absolute depth control.

• Mid-Water Buoyancy & Position Control: Flawlessly maintaining horizontal trim and using specialized anti-silting propulsion in the water column while your hands are busy managing reels.

• In-Water Emergency Simulations: Performing full valve isolation drills, team gas sharing, and simulated blacked-out mask exits along the line in an open water environment.

Evening: Debrief & Strategy Session

Back on land, we head to the restaurant to conduct a comprehensive tactical review of the afternoon’s activities. With a cold drink in hand, your instructor will debrief your team’s performance, refine your line handling, and map out the dive plans for your upcoming penetration phases.

Day 3: Advanced Land Drills & Open Water Transition

Day 2 builds directly on your initial skills, moving from shallow mechanics to real-world application. Today, we focus heavily on pre-dive accountability, technical team drills, and transitioning your line work to the marine environment.

Morning: Dive Planning & Precision Land Drills

We kick off the morning at the beachfront restaurant to continue your technical academics and make any necessary adjustments to your equipment harness based on yesterday’s sessions.

Before heading to the boat, the team transitions to critical practical and dry-land drills:

• Primary Line Laying: Perfecting the physical mechanics of team line deployments, tie-offs, and wrap placements on land.

• Technical Dive Planning: Calculating strict gas matching schedules, Rule of Thirds/Sixths boundaries, and runtime protocols.

• Gas Analysis: Personally testing and logging all cylinder contents, confirming oxygen percentages, and labeling your maximum operating depths (MOD) if executing decompression profiles.

Afternoon: Open Water Skills Application (Dives 1 & 2)

Following a lunch break, we board the boat to put your dry drills into practice in the open ocean. These dives focus on mastering your technical safety protocols directly along the exterior of the wreck site.

Under the direct evaluation of your instructor, you will execute:

• Real-World Guideline Mechanics: Laying and retrieving primary lines along an actual structure while maintaining absolute depth control.

• Mid-Water Buoyancy & Position Control: Flawlessly maintaining horizontal trim and using specialized anti-silting propulsion in the water column while your hands are busy managing reels.

• In-Water Emergency Simulations: Performing full valve isolation drills, team gas sharing, and simulated blacked-out mask exits along the line in an open water environment.

Evening: Debrief & Strategy Session

Back on land, we head to the Tech shack to conduct a comprehensive tactical review of the afternoon’s activities. With a cold drink in hand, your instructor will debrief your team’s performance, refine your line handling, and map out the dive plans for your upcoming penetration phases.

Day 4: Technical Final Exam & Advanced Emergency Navigation

Day 4 marks a major shift in your technical training. This morning you will validate your theoretical knowledge on paper, before heading back to the wreck to master the most critical emergency response protocols used in technical overhead diving.

Morning: Final Exam & Advanced Contingency Land Drills

We start the morning at the restaurant by wrapping up your technical classroom modules and completing the TDI Advanced Wreck Final Exam.

Once the academics are officially signed off, the team shifts directly into highly specialized dry-land practical drills, building the precise muscle memory required to handle complex emergency scenarios inside an overhead environment:

• Lost Line Protocols: Learning how to systematically deploy a search reel to relocate a primary guideline in total visibility loss or a silt-out.

• Lost Diver Procedures: Mastering the team communication, search grid mechanics, and light-signaling protocols used to locate a missing teammate inside a structure.

Afternoon: Technical Dives 4 & 5 (The Emergency Scenarios)

After lunch, we board the boat and head back out to the HTMS Sattakut. Today’s dives transition your morning land drills into real-world underwater problem-solving along and within the wreck structure.

Under the close evaluation of your instructor, your team will execute:

• In-Water Lost Line Drills: Simulating a complete disconnection from your exit line and executing a disciplined, reel-assisted search to re-establish a continuous guideline to the surface.

• In-Water Lost Diver Drills: Managing a high-stress teammate separation scenario using precise, coordinated team search search patterns without compromising your own gas rules or exit routes.

• Overhead Mechanics Validation: Continuing to refine your absolute depth control, horizontal trim, and anti-silting propulsion while managing these complex, task-loaded scenarios.

Evening: Sunsets & Tactical Analysis

Back on land, we return to the beachfront bar to review the day’s training. While admiring the Koh Tao sunset, your instructor will conduct a comprehensive tactical debrief, analyzing your team’s communication, reaction times, and emergency management to get you fully prepped for the final graduation days.

This is a flexible day that can be utilised as required e.g. as an additional training day or to gain further experience.