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Defense

Svalbard constitutes a demilitarized zone, as the treaty prohibits the establishment of military installations on the islands. However, since the treaty recognizes Norway as the sovereign power in the archipelago, the country claims exclusive rights in the maritime zone around the islands; rights which Norway argues permit the Norwegian Coast Guard to conduct fishery and other maritime surveillance and enforcement in these waters. Certain other parties to the treaty (including Spain, Iceland and particularly Russia) argue that the Treaty provides them with extensive rights beyond Svalbard's territorial sea. Norway claims an exclusive economic zone of more than three-quarters of a million square kilometers around Svalbard, though "Russia does not recognize Norwegian functional rights with respect to the Svalbard Fisheries Protection Area".

In the 2020s, in order to strengthen Norway's ability to enforce its claims around the archipelago, the Norwegian Coast Guard embarked on a significant modernization program. As of 2023, the Coast Guard is replacing its older Nordkapp -class offshore patrol vessels with significantly larger ice-capable ships, each displacing just under 10,000 tonnes. The three new Jan Mayen -class offshore patrol vessels are armed with a 57 mm (2.2 in) main gun and are capable of operating up to two medium-sized helicopters. The ships have a maximum speed is 22 knots (41 km/h; 25 mph) with more than 60 days endurance and the complement is up to 100 people. The first ship, KV Jan Mayen, was delivered in early 2023. These vessels will complement NoCGV Svalbard which predominantly serves Svalbard and the surrounding waters. In 2023, Norway also announced the acquisition of six MH-60R helicopters which are to be initially deployed with the Coast Guard, though they are to be prepared to be equipped for anti-submarine operations as well. The Royal Norwegian Navy patrols waters of the Svalbard Archipelago at least once a year with a Fridtjof Nansen -class frigate.

The Royal Norwegian Air Force fleet of Boeing P-8 Poseidons stationed at Evenes Air Station on the mainland have capacity for surveillance of the Svalbard Archipelago as part of the surveillance of the Barents Sea. The F-35s of the Royal Norwegian Air Force stationed at Evenes Air Station has range to patrol over parts of the Svalbard Archipelago, and could also be stationed further north at Banak Air Station if deemed necessary.

With the 2022 Russian invasion of Ukraine, tensions in the Arctic have increased. In January 2022, an undersea telecommunications cable connecting Svalbard with mainland Norway was damaged. Norwegian suspicions fell on a Russian trawler as the only vessel in the area at the time. The investigation was nevertheless reported as inconclusive. In 2022, Russia announced new investment plans to support its presence at Barentsburg and Pyramiden.