OrganisationGB

Nautilus International

International maritime officers' union representing UK, Dutch and Swiss seafarers.

Nautilus International, the maritime officers' union, has spent 2026 pressing the International Maritime Organization to close liability and crewing gaps left open when its MASS Code for crewless ships was adopted on 22 May.

Last refreshed: 24 July 2026 · Appears in 1 active topic

Key Question

Who is legally liable when an ashore master cannot reach a crewless ship?

Timeline for Nautilus International

#4 1 Jul

Identified three unresolved gaps: liability, multi-vessel supervision safety, and workforce displacement

Autonomous Systems: Land & Sea: Crewless-ship rules duck the hard part

#5 1 Jul

Continued to press three unresolved liability gaps

Autonomous Systems: Land & Sea: The MASS Code enters force, its detail deferred

#2 1 Jun

Argued at the IMO that a master should remain aboard while any crew are present, contesting the MASS Code empty-bridge model

Autonomous Systems: Land & Sea: FAVOR funds the rulebook nobody finished

#1 22 May

Argued the master should stay aboard while any crew are present, contesting bridge-empty operations

Autonomous Systems: Land & Sea: First global code for crewless ships

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Background

Nautilus International is the trade union representing maritime officers and ratings across the UK, Netherlands, Switzerland and beyond. Formed through the 2009 merger of Nautilus UK and the Dutch Nautilus NL, it negotiates collective agreements for deep-sea cargo officers, cruise crew, ferry masters and offshore platform personnel, and is headquartered in London and Rijswijk. David Appleton heads its professional and technical department.

The union's wider significance is as the principal labour voice at the IMO and in national flag-state consultations on maritime automation. Its standing argument is that shore-based remote command shifts liability away from shipowners and reduces the emergency-response capability of vessels at sea, a case that positions Nautilus as the main counterweight to the Shipping Industry's cost argument for unmanning bridges.

Key Issues

Crewless-ship regulation

Nautilus contests the MASS Code's gaps

When the IMO adopted the MASS Code on 22 May 2026, Nautilus International identified three gaps it leaves unresolved: liability when a ship's master sits ashore during an incident, evidence that one master can safely oversee several vessels, and the loss of sea-going officer berths to shore-based control rooms.

The union has pressed those objections through the Code's Experience Building Phase, which runs non-mandatory until 2032, and again when the Code entered force on 1 July 2026 without national UK legislation attached. For Nautilus, each unresolved gap is also a bargaining point: how flag states settle liability and crewing questions will decide how many sea-going officer roles remote command removes.

Common Questions

What does Nautilus International say about autonomous ships?

Nautilus argues the MASS Code leaves three gaps unresolved: unclear liability when the master is ashore, no safety evidence for one master supervising multiple ships simultaneously, and no plan for the workforce displacement that follows as shore control rooms replace sea-going officer jobs.Source: Nautilus International / autonomous-land-sea update 4

Will the MASS Code lead to fewer jobs for seafarers?

Nautilus International argues yes: the shift to shore-based remote command accelerates the removal of officer berths from commercial ships. The IMO code is non-mandatory until 2032, so the pace depends on how flag states use the Experience Building Phase.Source: event

What is Nautilus International's position on the IMO MASS Code?

Nautilus International, representing maritime officers internationally, argues the master should stay aboard the vessel whenever any crew are present. It acts as a labour counterweight to the cost case for emptying the bridge entirely.Source: Lowdown briefing

Which countries does Nautilus International represent seafarers in?

Nautilus International primarily represents maritime officers and ratings in the UK, Netherlands and Switzerland, with additional international membership across deep-sea cargo, cruise, ferry and offshore sectors.Source: Nautilus International official

Who speaks for seafarers on the IMO MASS Code?

Nautilus International is the main seafarers' trade union engaging with the IMO MASS Code process, arguing for mandatory onboard master presence while any crew are aboard and raising liability and multi-vessel supervision concerns.Source: IMO MSC 111 process

How does autonomous shipping affect seafarer jobs?

Nautilus International warns that shore-based control rooms replacing bridge crews would eliminate higher-paid sea-going officer roles and shift those workers into lower-graded shore positions, a workforce displacement the MASS Code's Experience Building Phase does not address.Source: Nautilus International position statements

Source Material

Nautilus International official website

How the World Sees Them

IMO

The MASS Code keeps a human master responsible but is silent on physical location; Nautilus's push for mandatory onboard presence is the labour stake in how that ambiguity resolves nationally during 2026–2032.

Seafarers

Nautilus frames shore-based remote command as eliminating officer berths and shifting liability to operators who may lack the situational awareness needed to respond to emergencies aboard.

Shipping industry

Owners see remote bridge operations as a route to reducing crew costs on cargo ships. Nautilus's position, if adopted by flag states, would limit the commercial benefit of MASS operations.