Safety Norms: Naval Architecture Engineering

1Purpose, Scope, and Safety Principles

These norms set the minimum safety expectations for anyone who designs, calculates, tests, inspects, or supports the construction and repair of ships, boats, and offshore floating structures. They apply to laboratories, tank and basin testing, shipyard visits, drawing office work, and field surveys. Their purpose is to prevent injury, fatal accidents, pollution, and property damage, and to make sure design decisions do not expose workers or the public to foreseeable harm.

Three principles govern everything that follows. First, no task proceeds if its hazards are unknown. Second, controls are chosen in this order: eliminate, substitute, isolate, engineer out, then rely on administrative controls and personal protective equipment. Third, stop work when conditions change. Laws, class society rules, flag state requirements, and yard procedures vary by jurisdiction and must be verified with competent authorities, classification societies, or qualified professionals before use. This document is educational guidance. It does not replace formal training, professional authorization, approved procedures, supervision, or emergency services.

• Mandatory: no one enters a tank, basin, shipyard area, or vessel space without the authorization and briefing required for that location.
• Mandatory: every test rig, model, and onboard trial has a written plan that names the supervisor, hazards, and stop criteria.
• Recommended: use a one-page pre-task briefing for any activity outside the normal drawing office.

2Roles, Competence, and Accountability

The academic or employing organization holds overall accountability for safety. It must provide approved facilities, resources, and documented procedures. A designated safety lead maintains these norms, reviews incidents, and confirms that permits and training are current. Supervisors in the basin, workshop, or shipyard are responsible for planning each task, confirming competence, and stopping unsafe work. Individual participants must follow instructions, report hazards, and refuse tasks they have not been trained or authorized to perform.

Competence means demonstrated skill, not attendance alone. Typical examples include certified crane signaling where required, hot work permit holders, confined space entrants, and operators of towing carriages or wave generators. Where a credential is required by law or by a yard, the organization must verify it directly with the issuing body. Do not accept photocopies or verbal claims without checking.

• Mandatory: assign a named supervisor for every testing session, shipyard visit, and fieldwork activity.
• Mandatory: maintain a register of authorized operators for each machine, rig, and software tool, linked to training records.
• Mandatory: students and visitors work under direct supervision until the supervisor signs off their competence.
• Recommended: rotate a second trained person into each test team so no single person holds all operating knowledge.
• Recommended: include safety performance in project reviews and assessments.

3Hazards, Risk Assessment, and Risk Levels

Naval architecture work involves many hazards that look minor until they combine. In the towing tank and model basin, the main hazards are drowning, electrocution near water, and slips on wet walkways. Wave generators, towing carriages, and model launching cradles create crush and entrapment hazards. In the workshop, cutting, grinding, welding of test rig frames, and handling heavy plate or ballast weights create cuts, burns, and musculoskeletal injuries. Shipyard and drydock visits add falls from height, falling objects, confined spaces, hot work, and the hazards of moving vessels and cranes. Office work carries lower physical risk but still involves repetitive strain and data errors that can compromise stability or structural calculations.

Risk should be rated before work begins using a simple matrix of likelihood and severity with levels such as low, medium, high, and unacceptable. Unacceptable risks stop the activity until controlled. High risks need a supervisor's approval and a written control plan. Medium risks require a briefing and monitoring. Low risks need awareness and basic controls. Record each assessment, review it when conditions change, and reassess after any near miss.

• Mandatory: complete a written risk assessment for every basin test, stability experiment, shipyard visit, and onboard trial.
• Mandatory: treat water depth, power to moving equipment, and suspended loads as high risk until controlled.
• Recommended: consider wind, sea state, and tidal conditions in any dockside or onboard activity.
• Mandatory: confined spaces such as double bottoms, tanks, and voids are never entered without a formal permit and atmospheric testing by a qualified person.

4Preventive Controls and Safe Working Practices

Preventive controls reduce the likelihood of harm before any task starts. For water-based testing, controls include lifejackets fitted to the applicable standard, buoyant rescue equipment at the poolside, a prohibition on lone working, and a clearly marked emergency stop on every powered carriage. Model handling should use two people and mechanical aids for heavy or unbalanced hulls. Lifting operations need a rigging plan, a rated load, and a trained signal person. No one stands under a suspended load or within the swing radius of a crane or carriage.

Hot work, such as cutting or welding a test rig, requires a hot work permit, a fire watch, removal of flammable material, and extinguishers within reach. Stability and inclining experiments involve moving weights on a vessel or model, so the supervisor must confirm that weights are secured, the vessel is stable at each step, and personnel are kept clear of moving masses. Rigging and loading must follow the approved plan, and any change requires re-approval before work continues.

• Mandatory: apply lockout tagout to all machinery before maintenance, clearing, or adjustment, and verify zero energy before work starts.
• Mandatory: use a written permit for hot work, confined space entry, work at height, and heavy lifts above thresholds set by the local procedure.
• Mandatory: never exceed the rated capacity of cranes, hoists, slings, or carriages.
• Recommended: hold a short pre-start check of guards, emergency stops, and communication before each session.
• Mandatory: permits are closed out at the end of each shift and retained with the activity record.

5Equipment, Environment, Information, and Protective Safeguards

Personal protective equipment is the last line of defense, not a substitute for engineering controls. Minimum PPE for basin and workshop work normally includes safety footwear, eye protection, hearing protection where noise exceeds local limits, and gloves matched to the task. Life jackets or buoyancy aids are mandatory near open water, and immersion protection applies where water temperature and exposure justify it. Fall arrest equipment is required at height and must be inspected before use. Gloves must not be worn near rotating machinery. Select PPE using the manufacturer's instructions and the applicable standard, which varies by jurisdiction.

Environmental and information safeguards matter as well. Paints, antifouling coatings, resins, solvents, and fuel can contaminate water and soil. Waste oil, bilge water, and blasting residues must be collected and disposed of through approved channels. Ship design data, controlled military information, and commercially sensitive hull forms require access control, encryption where appropriate, and removal of confidential data from personal devices. Cybersecurity safeguards protect simulation and control systems from unauthorized changes that could affect stability or structural outcomes.

• Mandatory: store flammable paints and solvents in approved cabinets and keep safety data sheets accessible.
• Mandatory: use only approved containers for bilge water, oils, and blasting debris, and never discharge them to drains or open water.
• Mandatory: restrict access to controlled design data and revoke credentials when personnel leave.
• Recommended: check that simulation and rig control software has version control and a documented change process.

6Maintenance and Equipment Integrity

Test rigs, carriages, wave generators, cranes, pumps, and survey instruments degrade over time. Maintenance must follow manufacturer instructions and the approved plan. Only trained technicians may perform electrical, hydraulic, or mechanical repairs. Guards and interlocks must not be bypassed, even temporarily. Any defect that compromises safety removes equipment from service with a clear tag until it is repaired and verified by the responsible person.

Inspection intervals depend on equipment type, use, and applicable standards, which must be verified locally. Load test certificates, lifting gear examinations, and electrical testing records should be current before use. Where a classification society or regulator requires periodic survey, follow that schedule and keep the evidence.

• Mandatory: out-of-service tags are placed on defective equipment and removed only after verification by the responsible person.
• Mandatory: guards, interlocks, and emergency stops are tested before each session and never bypassed.
• Mandatory: residual current protection is used for portable electrical equipment near water.
• Recommended: keep a maintenance log for each rig recording defects, repairs, and parts replaced.

7Incident, Near-Miss, Emergency Response, and Escalation

Every injury, near miss, spill, property damage event, or unsafe condition must be reported to the supervisor immediately and recorded within the period set by the local procedure. Near misses matter because they reveal weaknesses before someone is hurt. Good-faith reporters must be protected from blame. The supervisor secures the scene, provides first aid within the scope of their training, calls emergency services when needed, and notifies the safety lead.

Emergency response plans must cover man overboard, drowning, fire, electric shock, crush injury, fall from height, chemical release, and oil spill. Plans name assembly points, emergency contacts, rescue equipment, and trained first aid responders. Rescue from water or confined spaces must be done only by trained rescuers. Untrained people must not enter water, tanks, or voids to rescue others; they should raise the alarm and call for trained help. Investigate every serious incident to find root causes and update controls.

• Mandatory: call emergency services without delay for any serious injury, fire, drowning risk, or uncontrolled release.
• Mandatory: stop the activity and secure the area when an unsafe condition is found.
• Mandatory: report pollution to the responsible authority as required by local law and the environmental procedure.
• Mandatory: do not attempt rescue beyond your training; alert trained responders instead.
• Recommended: run emergency drills at least once per term, with a written debrief.

8Records, Training, Inspection, and Review

Records prove that controls exist and were used. Keep risk assessments, permits, training records, equipment certificates, maintenance logs, incident reports, and test plans together, and retain them for the period required by the organization and applicable regulations. Records should be legible, stamped by the recording system, and protected from unauthorized alteration. Never sign records for work that was not witnessed.

Training must be role based and refreshed when procedures change. Initial induction covers these norms, site rules, emergency procedures, and the specific equipment used. Refresher intervals should follow organizational policy and any applicable standard. Review these norms at least annually against incident data, audit findings, and changes in law, class rules, and technology. Feedback from students, technicians, and supervisors should drive improvements.

• Mandatory: keep training records linked to each authorized operator and each supervisor.
• Mandatory: review and update risk assessments after any incident, equipment change, or new test type.
• Recommended: run periodic internal audits of permits, PPE use, and housekeeping.
• Recommended: track near misses as a leading indicator, not only injuries.

Implementation checklist

• Confirm the risk assessment, test plan, and stop criteria are written and approved before work starts.
• Verify the supervisor and every operator are authorized for the specific equipment in use.
• Inspect guards, interlocks, emergency stops, and rigging before each session.
• Apply lockout tagout and verify zero energy before any maintenance or clearing.
• Wear PPE matched to the task, including flotation wherever water exposure exists.
• Obtain the required permit for hot work, confined space entry, work at height, or heavy lifts.
• Keep oils, paints, solvents, and bilge water in approved containers and out of drains.
• Protect controlled design data and lock workstations when leaving them.
• Report every incident and near miss immediately and secure the scene.
• Verify local laws, class rules, and yard procedures with qualified professionals before relying on this guidance.