Product Overview

Summary: This Watercraft Stability Testing Safe Operating Procedure provides a clear, step‑by‑step method for safely assessing the stability and seaworthiness of vessels in Australian conditions. It helps operators control capsizing and man‑overboard risks while demonstrating due diligence under WHS and marine safety legislation.

Watercraft stability is a critical safety factor for any vessel operating in Australian waters, from small workboats and pilot vessels through to commercial fishing boats and passenger craft. Poorly controlled stability testing can expose workers to serious hazards including slips, falls overboard, crush injuries, and uncontrolled vessel movement, while inadequate or undocumented testing can lead to catastrophic capsizing incidents once the vessel is in service. This Safe Operating Procedure sets out a structured, repeatable approach to planning, conducting, and documenting stability tests so that both personnel and assets are protected throughout the process.

The SOP guides your team through pre‑test planning, risk assessment, load case definition, ballasting, instrumentation setup, execution of inclining or other stability tests, and post‑test verification. It embeds WHS principles into every stage, ensuring that controls for working over water, use of lifting and mooring equipment, and interaction with shore‑based plant are clearly defined. By implementing this procedure, businesses can demonstrate compliance with Australian maritime and WHS requirements, reduce variability in testing outcomes, and provide defensible evidence of vessel stability for surveyors, regulators, and clients. The result is safer trials, better quality data, and greater confidence that each vessel placed into service meets its intended stability performance.

Key Benefits

• Ensure vessel stability tests are conducted safely, systematically, and in line with Australian maritime and WHS expectations.
• Reduce the risk of capsizing, man‑overboard incidents, and uncontrolled vessel movements during testing activities.
• Standardise testing methodology across sites and teams, improving data quality and repeatability for naval architects and surveyors.
• Demonstrate due diligence and compliance to regulators, auditors, and clients through clear documentation and sign‑off processes.
• Improve coordination between marine crews, shore‑based personnel, and contractors by clarifying roles, communication protocols, and emergency responses.

Who is this for?

• Marine Operations Managers
• Shipyard and Boatyard Supervisors
• Naval Architects and Marine Engineers
• Commercial Vessel Owners and Operators
• Harbour Masters and Port Operations Coordinators
• WHS Managers in Marine and Maritime Businesses
• Test Facility Technicians
• Boat Builders and Repairers
• Aquaculture Site Supervisors
• Defence and Government Marine Fleet Managers
• Recreational Marina Managers

Hazards Addressed

• Capsize or excessive heel of the vessel during inclining and stability tests
• Man‑overboard incidents when working near the edge of wharves, pontoons, or vessel decks
• Slips, trips and falls on wet, cluttered, or uneven working surfaces
• Crush and pinch injuries from moving lines, fenders, and mooring equipment
• Struck‑by incidents from shifting test weights, ballast, or unsecured equipment
• Drowning and immersion in cold water
• Musculoskeletal injuries from manual handling of test weights and equipment
• Electrical hazards from power and instrumentation used in marine environments
• Exposure to adverse weather, heat stress, and UV during extended outdoor testing
• Collision or contact with other vessels, structures, or fixed objects during manoeuvring

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Definitions and Abbreviations
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Applicable Vessels and Testing Environments
• 5.0 Pre‑Test Planning and WHS Risk Assessment
• 6.0 Environmental and Operational Conditions for Testing
• 7.0 Required Equipment, Instrumentation and PPE
• 8.0 Vessel Preparation, Ballast and Load Case Setup
• 9.0 Mooring, Access and Over‑Water Safety Controls
• 10.0 Step‑by‑Step Stability Testing Procedure (Inclining and Other Methods)
• 11.0 Monitoring, Communication and Control of Vessel Movements
• 12.0 Data Recording, Verification and Quality Control
• 13.0 Post‑Test Activities, Demobilisation and Housekeeping
• 14.0 Emergency Preparedness and Response (Man‑Overboard, Capsize, Injury)
• 15.0 Documentation, Reporting and Recordkeeping Requirements
• 16.0 Training, Induction and Competency Assessment
• 17.0 Review, Audit and Continuous Improvement of the Procedure

Legislation & References

• Marine Safety (Domestic Commercial Vessel) National Law Act 2012
• Marine Order 503 (Certificates of survey – national law) – Australian Maritime Safety Authority (AMSA)
• National Standard for Commercial Vessels (NSCV) – Part C: Design and Construction (including stability requirements)
• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory WHS Regulations
• Safe Work Australia – Managing the Risk of Falls at Workplaces Code of Practice
• Safe Work Australia – Managing Risks of Plant in the Workplace Code of Practice
• AS/NZS 4801:2001 Occupational health and safety management systems (superseded but still widely referenced)
• AS/NZS ISO 31000:2018 Risk management – Guidelines
• AS/NZS 1891 series: Industrial fall‑arrest systems and devices
• AS 4758:2015 Lifejackets