8 January 2025

The UK has become one of the leaders internationally in upholding the safe operation of smaller Remotely Operated Unmanned Vessels (ROUVs). Marine Guidance Notice (MGN) 705 (M), which came into force on 31 December 2024, sets out a pathway for operation of the rapidly growing number of hi-tech ROUVs between 2.5 and 4.5 metres in length.

Extensive consultation began in 2022 with a range of maritime industries; this guidance now puts the UK among the first in the world to formally set out the scope of regulation and operators’ obligations in this emerging category. 

The core of MGN 705 (M) is a two-year general exemption for eligible ROUVs. Key obligations are set out for owners and operators, such as for eligible ROUVs to be under constant supervision by a human able to take control at any time. A safety assurance assessment must be declared before operation, and speed will be limited to six knots or planing speed, whichever is lower. Other safety requirements cover vessel visibility, anti-fouling, and remote camera capability.

The MCA has committed to reviewing MGN 705 (M) by 31 December 2027 to ensure the conditions remain supportive for ROUV technology to progress safely.

General Exemption enables eligible vessels to operate without certification issued by the MCA or its delegates.

Remotely Operated Unmanned Vessel (ROUV) means a vessel with no persons on board that is operated from a location remote to the vessel. 

MGN 705 (M) follows MGN 702 (M) which gave a general exemption to ROUVs less than 2.5 metres in length. ROUVs above 4.5 metres are certified using the Workboat Code Edition 3 and by submission of appropriate equivalence requests.

Read Marine Guidance Notice 705 (M) by visiting MGN 705 (M) Remotely operated unmanned vessels (ROUVs) of 2.5 metres to less than 4.5 metres in length overall.

British Marine members can get more advice or guidance by emailing technical@britishmarine.co.uk