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newSchoolWorks.com › VoTechWorks › Agriculture, Environment & Public Service › Aquaculture & Marine Science Tech › Commercial Diving Introduction for Aquaculture and Marine Science › Lesson 12
AGR-AQUA50-06 · Lesson 12 · 8 clock hours · field

Integrated Open-Water Dive Assessment and Commercial Dive Simulation

Objective. Students will execute a complete commercial-style dive evolution — pre-dive documentation, in-water work tasks, emergency response scenario, and post-dive debriefing — demonstrating competency across all course skill areas.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a licensed professional in the field or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.

VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.

Integrated Open-Water Dive Assessment and Commercial Dive Simulation

This field session is the capstone of your Commercial Diving Introduction course. You will perform a complete commercial-style dive evolution in open water, rotating through three critical roles: diver, standby diver, and dive supervisor. Each role carries distinct responsibilities, and your performance in every role is evaluated against an ADCI role-performance checklist. There are no passengers in this session — every student is assessed, every evolution counts.

Why a Simulated Commercial Evolution Matters

Commercial diving is a team operation governed by a chain of responsibility. On a real job site, a failure by the supervisor, the standby diver, or the working diver can injure or kill someone. The ADCI standards that govern commercial diving require that each role be staffed by a qualified person who understands their duties before the first diver enters the water. This session gives you the experience of functioning inside that team under controlled but realistic conditions, building the habits employers will expect from day one.

Pre-Dive Documentation

Before entering the water, the student assigned as dive supervisor must complete all required pre-dive paperwork. This includes a dive plan that records the planned maximum depth, bottom time, breathing gas, decompression obligation (if any), and emergency contacts. A dive team roster identifies who is in each role. Equipment inspections are logged and signed. Nothing enters the water until the supervisor signs the authorization.

Instructors will check documentation for completeness before the evolution begins. Missing or unsigned forms are a critical safety omission and will result in a non-satisfactory rating for that evolution.

Role Responsibilities

Working Diver — You are responsible for completing the assigned in-water task (for example, recording observations on an underwater slate, inspecting a structure, or recovering a prop). You must maintain communication with the surface at all times using established line-pull or voice signals, manage your buoyancy, track your bottom time, and ascend on the planned schedule. Any change in conditions — equipment problem, loss of visibility, physical distress — must be signaled immediately.

Standby Diver — You remain fully suited and ready to enter the water within one minute of being directed. You monitor the working diver's umbilical or line, maintain your own readiness, and watch for distress signals. If the emergency scenario is injected, you enter the water, locate and support the distressed diver, and assist in the rescue sequence you practiced in Lesson 8, including surface support and transfer to the oxygen unit.

Dive Supervisor — You manage the entire evolution from the surface. You control the dive log, watch bottom time, maintain voice or line contact with the diver, brief and monitor the standby diver, and make all abort decisions. During the simulated emergency, you direct the standby diver, call for oxygen, and begin completing the accident report form. You are the last person whose signature protects everyone.

Mid-Dive Emergency Injection

At an unannounced point during the session, the instructor will signal a simulated diver distress at the surface. The standby diver and supervisor must immediately execute the emergency response sequence. This includes: standby diver enters water and reaches the distressed diver, diver is supported at the surface and removed from the water, oxygen is administered using the unit on site, and the accident report form is started by the logging student or supervisor. Timing and accuracy of documentation are part of the evaluation. Oxygen administration protocols follow established first-aid guidelines; do not adjust or improvise the equipment without instructor direction.

PPE and Safety Requirements

All students must enter the water with a properly fitted BCD, regulator with redundant second stage, wetsuit or drysuit appropriate to water temperature, weight system, mask, fins, dive knife or line cutter, and dive computer or depth gauge and timer. The standby diver must be in full gear at all times while a diver is in the water. The oxygen unit must be staged, turned on, and flow-tested before the first diver enters the water. An emergency action plan, including the location of the nearest hyperbaric chamber, must be posted at the dive station before the evolution begins.

Do not dive if you are feeling ill, congested, fatigued, or have any ear or sinus discomfort. Surface immediately and signal the supervisor if any of these conditions develop during the dive.

Post-Dive Debrief

After equipment is stowed and dive logs are closed, each student completes a self-evaluation rubric rating their own performance in four areas: buoyancy control, task completion, surface communication, and documentation quality. Be honest — the goal is to identify gaps before you enter the workforce, not to score yourself high. You will then compare your self-ratings with instructor ratings during a structured 20-minute debrief. Differences between your self-assessment and the instructor's assessment are learning opportunities, not penalties.

Completing the Competency Gate

This session is the terminal practical competency gate for the course. To pass, all three role-performance checklists must be rated satisfactory by the instructor with no critical safety omissions, and your self-evaluation debrief form must be submitted. Students who receive a non-satisfactory rating in any role will receive instructor feedback and may be scheduled for one remediation dive at program discretion. Successful completion supports your eligibility for ADCI commercial diver certification and documents practical experience toward your PADI Rescue Diver credential.

Key terms8

Dive EvolutionA complete, structured dive operation from pre-dive planning and documentation through in-water work to post-dive debrief and log closure.
Standby DiverA fully suited and geared diver who remains ready to enter the water immediately to assist or rescue the working diver; a required position under ADCI standards whenever a diver is in the water.
Dive SupervisorThe qualified person at the surface who manages the dive team, controls the dive log, maintains diver communication, and holds authority to abort the dive at any time.
ADCI Role-Performance ChecklistA standardized evaluation form used by the Association of Diving Contractors International to assess whether a diver, standby diver, or supervisor has met all required duties during a dive evolution.
Accident Report FormThe written documentation completed after a diving incident that records the sequence of events, personnel involved, response actions taken, and outcome; required by ADCI standards.
Emergency Action Plan (EAP)A written, site-specific document posted before any dive operation that identifies emergency contacts, the location of the nearest hyperbaric chamber, oxygen unit location, and procedures for common diving emergencies.
Competency GateA required performance checkpoint that a student must pass before a credential or course completion is awarded; failure triggers remediation rather than automatic progression.
Self-Evaluation RubricA structured scoring form on which a student rates their own performance against defined criteria, used to develop professional self-awareness and identify skill gaps.
In class: Students rotate through three roles (diver, standby diver, dive supervisor) during a two-tank open-water session; each role is evaluated against an ADCI role-performance checklist for a minimum of one full dive evolution per role. · Mid-dive emergency injection: instructor signals a simulated diver distress at the surface; standby diver and supervisor must execute the emergency response sequence from Lesson 8 while the logging student documents the incident on an accident report form. · Post-dive debrief: each student completes a self-evaluation rubric rating their own buoyancy, task completion, communication, and documentation quality, then compares it against instructor ratings during a structured 20-minute debrief.
Materials: Scuba units, SSA panel (if available), ADCI role-performance checklists, underwater slates, rescue mannequin, oxygen unit, post-dive debrief rubrics, dive logs
Check: All three role checklists rated satisfactory by instructor (no critical safety omissions); self-evaluation debrief submitted; this session serves as the terminal practical competency gate for the course.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

ADCI Commercial Diver — Supervisor Responsibilities
1. Before the first diver enters the water during a commercial dive evolution, who is responsible for signing the dive authorization and confirming that pre-dive documentation is complete?
ADCI Commercial Diver — Emergency Response
2. During the capstone session, the instructor injects a simulated diver-distress signal at the surface. Which action should the standby diver take first?
ADCI Commercial Diver — Site Safety Requirements
3. Which piece of safety equipment must be staged, turned on, and flow-tested before the first diver enters the water at any commercial dive site?
ADCI Commercial Diver — Role Accountability
4. A student receives a non-satisfactory rating in the standby diver role because they failed to maintain full gear readiness while the working diver was submerged. This is classified as which type of evaluation outcome?
Professional Practice — Reflective Learning
5. During the post-dive debrief, a student rates their own buoyancy as excellent, but the instructor rates it unsatisfactory due to observed contact with the bottom during the task. What is the primary purpose of comparing these two ratings?
PADI Rescue Diver / ADCI — Diver Health and Safety
6. Which of the following conditions should cause a student to notify the supervisor and abort a dive before or during the capstone session?
ADCI Commercial Diver — Emergency Preparedness
7. The Emergency Action Plan (EAP) must be posted at the dive station before the evolution begins. Which of the following items is a required element of the EAP?
ADCI Commercial Diver — Competency Standards
8. During a two-tank open-water capstone session, a student must serve as working diver, standby diver, and dive supervisor for a minimum of one full dive evolution each. This requirement is primarily designed to ensure what?
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