Workboat Code Edition 3: What Vessel Operators Need to Know

The UK commercial vessel sector is undergoing a significant regulatory overhaul. Since 13 December 2023, the Workboat Code Edition 3 — officially published on 22 January 2025 by the Maritime and Coastguard Agency (MCA) — has been in force, replacing the previous Workboat Code Edition 2 and the original 'Brown Code' of 1998. Developed with the full industry — British Marine, Lloyd's Register, the Workboat Association and the Royal Yachting Association — it establishes the new safety, technical and operational standard for small commercial vessels under 24 metres. For vessel owners, masters and operators, understanding this new framework is now essential.

What is the Workboat Code, and why a third edition?

The Workboat Code is the code of practice governing the safety of small commercial vessels operating in UK waters, as well as UK-flagged vessels operating internationally. It defines the technical, safety and operational standards that vessels must meet to obtain and maintain their certificate.

Before Edition 3, operators had to navigate a patchwork of overlapping regulations: the 1998 Brown Code, Workboat Code Edition 2 and its amendments, and various Marine Guidance Notes. Edition 3 consolidates all of this into a single, modern and coherent document, given legal effect by the Merchant Shipping (Small Workboats and Pilot Boats) Regulations 2023 (SI 2023/1216).

Who does Workboat Code Edition 3 apply to?

The Code applies to all small commercial vessels under 24 metres operating in UK waters, and to UK-flagged vessels wherever they operate. Vessel types covered include:

• Pilot boats and harbour assistance vessels
• Workboats — towing, survey, dredging, offshore construction
• Crew Transfer Vessels (CTVs) serving offshore wind and energy installations
• Survey and inspection vessels (ROV support, hydrographic, cable-laying)
• Remotely Operated Unmanned Vessels (ROUVs) — a major innovation in this edition
• Vessels holding a Light Duty Workboat Certificate alongside an existing sport and pleasure code certificate

The 6 key changes in Workboat Code Edition 3

1. A single, simplified regulatory framework

The most immediately practical change is the consolidation of all applicable requirements into one document. The Brown Code, Edition 2 and its amendments are fully superseded. From 13 December 2023, new vessels must be certified under Edition 3. Existing vessels have until their next renewal survey — or by 13 December 2026 at the latest — to comply. This simplification is particularly valuable for smaller operators who lack dedicated compliance teams.

2. Safety Management System (SMS): now mandatory for all vessels

Arguably the most structurally significant change: Section 31 and Appendix 8 of the Code make a Safety Management System mandatory for all certified vessels, with a deadline of 13 December 2026. The SMS — Safety Management System must be proportionate to the size and operational complexity of the vessel, and must cover:

• A safety and environmental protection policy
• Clear definition of responsibilities on board and ashore
• Formal risk assessments for each type of operation
• Documented emergency procedures (man overboard, fire, abandonment, emergency towing)
• A near-miss reporting and continuous improvement system
• A crew fatigue management policy
• Preventive maintenance procedures and safety equipment testing schedules

A 10-metre inshore survey vessel will have a simpler SMS than a 24-metre CTV operating 80 miles offshore — but both must have one.

3. Remotely Operated Unmanned Vessels (ROUVs): a dedicated regulatory framework

For the first time in UK maritime safety legislation, Annex 2 of the Code provides a dedicated framework for Remotely Operated Unmanned Vessels — workboats operating without crew on board, controlled from a Remote Operation Centre ashore or on a mother vessel. This is a landmark development: autonomous commercial vessels are no longer a grey area, they are now formally regulated.

ROUVs must comply with the SMS requirements immediately from the Code's entry into force (13 December 2023), without the transitional period available to conventional vessels. They must also maintain a detailed working log at the control position covering course, weather, speed, signal loss events, steering failures, safety alarms and all changes of command.

4. Lithium-ion batteries and alternative fuels: safety rules finally in place

Annex 1 of the Code delivers the first comprehensive set of safety requirements for battery-electric and battery-hybrid workboats. The rules cover battery room ventilation, gas detection systems, fixed fire suppression (mandatory for all battery boxes and rooms), thermal runaway management and charging arrangements.

This regulatory certainty has been long awaited by builders and operators investing in zero-emission vessels. With Edition 3, the UK positions itself at the forefront of certifying decarbonised commercial workboats.

5. Crew training: competency-based requirements

Edition 3 marks a shift from purely prescriptive requirements — lists of equipment to carry — to competency-based standards focusing on what crew can actually do. Key changes include:

• MCA-recognised navigation and radar qualifications required for masters of certain vessel categories
• Regular documented safety drills: man overboard, fire, vessel abandonment, emergency towing
• Demonstrated familiarity with all lifesaving appliances on board
• Fire-fighting training adapted to the vessel's propulsion system, including battery fire procedures for electric vessels

6. Cybersecurity: a formal new regulatory obligation

Section 31.3 of the Code introduces cybersecurity as a formal obligation for all operators, drawing on IMO resolution MSC.428(98). Modern commercial vessels — especially ROUVs — are connected systems exposed to cyber threats. Cybersecurity measures must be proportionate to vessel size and complexity, and must include:

• Identification of all critical systems whose disruption would compromise vessel safety
• Designated responsibilities for cyber risk management on board and ashore
• Protection and defence measures against cyber-attacks on IT, OT and remote systems
• Timely detection of intrusions or anomalies, with alerts at the control position
• A continuity plan enabling the vessel to reach a safe haven after a cyber-attack
• An electronic log of all remote access to vessel systems, kept up to date at all times

A formal cyber risk assessment must be carried out and renewed whenever significant changes are made to systems, or at least every five years. This requirement applies immediately to ROUVs, and by 13 December 2026 for all other certified vessels.

Compliance timeline: key dates

The transition to Workboat Code Edition 3 follows a progressive schedule:

• 13 December 2023: Code enters into force. All new vessels must be certified under Edition 3 from this date.
• Existing vessels (Brown Code or Edition 2): must comply before their next renewal survey, or by 13 December 2026 at the latest.
• SMS and Cybersecurity (Section 31): mandatory for all conventionally operated vessels by 13 December 2026. ROUVs must comply immediately.

The December 2026 deadline is approaching. If your vessel is still operating under the Brown Code or Edition 2, the time to act is now — not six months before the deadline.

How BoatOn Book can help you comply

The Workboat Code Edition 3 demands rigorous documentation: a formalised SMS, preventive maintenance plans, crew work and rest records, incident and near-miss logs, safety drill records. Managing all of this on paper or in spreadsheets creates risk — both operational and regulatory.

BoatOn Book is a maritime CMMS (Computerised Maintenance Management System) designed to simplify the management of commercial vessel fleets. It enables operators to:

• Centralise and formalise their SMS: maintenance plans, safety checklists and emergency procedures, accessible on board and ashore
• Plan preventive maintenance and automatically generate activity reports compliant with Code requirements
• Maintain a precise electronic logbook with navigation data (position, speed, heading)
• Manage crew work and rest hours in compliance with MCA and MLC requirements
• Track incidents, near-misses and safety drills to demonstrate continuous improvement to surveyors
• Monitor fleet carbon footprint in anticipation of growing environmental obligations

Conclusion: start your compliance journey now

The Workboat Code Edition 3 is a significant step forward for small commercial vessel safety. It modernises the regulatory framework, introduces a long-overdue structure for ROUVs and alternative-fuel vessels, and formalises SMS and cybersecurity as operational essentials — not optional extras.

For operators affected, the December 2026 deadline is close. Map the changes that apply to your fleet, begin structuring your SMS, and invest in the digital tools that will make compliance sustainable rather than burdensome.

Want to find out how BoatOn Book can support your compliance with Workboat Code Edition 3? Request a free demonstration today.