Ten JEF Navies Sign the Northern Navies Initiative Aboard HMS Prince of Wales
The UK and nine JEF allies signed the Northern Navies Initiative aboard HMS Prince of Wales, aiming to let ten navies operate as a single maritime force.
First Sea Lord General Sir Gwyn Jenkins signed the Northern Navies Initiative aboard the aircraft carrier HMS Prince of Wales during the International Sea Power Conference held in Oslo on November 10-11. According to a Naval News report published November 12, representatives from the other member navies of the Joint Expeditionary Force (JEF) attended the ceremony.
Reports identify ten signatory JEF maritime nations: the United Kingdom, Denmark, Estonia, Finland, Iceland, Latvia, Lithuania, the Netherlands, Norway and Sweden. Some outlets describe the group as “the Royal Navy and its nine JEF partners” — the same ten countries counted a different way.
Per UK Defence Journal and Forces News, the initiative aims to establish the JEF as a maritime vanguard for NATO across the North Atlantic, High North and Baltic regions. It does not create a new command structure; instead, it is designed to let the ten navies act early in a crisis, combine forces quickly, and transition seamlessly into NATO command if wider mobilization becomes necessary.
Practical elements of the agreement include joint pre-crisis planning and a push toward operating to one shared standard with interoperable equipment. The initiative also explicitly covers threats below the threshold of armed conflict, with particular emphasis on risks to undersea infrastructure such as cables and pipelines.
Accounts differ slightly on the initiative’s origin: one report frames it as delivering on a Statement of Intent the First Sea Lord proposed in London last April, while Jenkins himself is quoted describing it as the product of nine months of intensive work. The two framings are not contradictory — they simply emphasize different stages of the same process.
Portsmouth.co.uk characterizes the agreement as a critical treaty meant to address “multiplying threats,” though it does not enumerate those threats in detail. Naval Today frames the initiative as a step toward the ten JEF navies functioning as a single maritime force.
The move comes amid heightened geopolitical tension across Europe’s northern flank. Suspicious incidents involving undersea cables and pipelines in the Baltic Sea in recent years have accelerated NATO members’ push toward deeper regional maritime cooperation, and the Northern Navies Initiative stands out as one of the most concrete and wide-ranging results of that push to date.
JEF itself is a UK-led security cooperation framework established in 2014, bringing together ten northern European nations in a structure that operates independently of, but compatible with, NATO. The Northern Navies Initiative deepens the maritime dimension of that framework, aiming to tie the member navies’ operations more tightly together — though how well this works in practice will only be tested in future exercises and crisis scenarios.
The initiative’s relationship to NATO is a notable detail in its own right: the agreement does not replace NATO, but is meant to let JEF navies integrate faster and more smoothly into a NATO operation when one is needed. This fits a broader pattern within the Alliance of regional sub-groupings playing a complementary role to NATO’s overall capacity rather than competing with it.
Holding the signing ceremony aboard an aircraft carrier was itself a deliberate symbolic choice, underscoring maritime power. HMS Prince of Wales has carried out successive deployments to the North Atlantic and High North during 2026, reinforcing — at a symbolic level — the priority the UK places on northern maritime security. Questions about how frequently the ten navies will now exercise together, which command-and-control systems will be harmonized, and how costs will be shared remain unanswered; none of the available reporting includes a concrete timeline or budget figures, suggesting further implementation details are still to come.
Sources:
Naval News, “UK and JEF Allies Sign Landmark Northern Navies Initiative Aboard HMS Prince of Wales,” November 12, 2026, https://www.navalnews.com/naval-news/2026/11/uk-and-jef-allies-sign-landmark-northern-navies-initiative-aboard-hms-prince-of-wales/ — primary source for the ceremony’s core details.
UK Defence Journal, “JEF navy chiefs sign Northern Navies agreement in Oslo,” November 2026, https://ukdefencejournal.org.uk/jef-navy-chiefs-sign-northern-navies-agreement-in-oslo/ — used for the initiative’s origin and list of signatories.
Forces News, “Northern Navies: New agreement sees Royal Navy and JEF allies operate as one,” November 2026, https://www.forcesnews.com/services/navy/royal-navy-has-signed-agreement-joint-expeditionary-force-allies-will-increase — used for the agreement’s practical elements.
