European Security — 2026-04-12

Swedish Gripens Intercept Russian Kilo-Class Submarine in Kattegat Strait

Swedish JAS 39 Gripen fighter jets intercepted and began escorting the Russian Kilo-class submarine Novorossiysk (B-261) in the Kattegat strait on April 10, with the Swedish Navy and Coast Guard joining the shadowing operation as the vessel transited toward the Baltic Sea. The Swedish Armed Forces described the operation as part of planned activities to ensure territorial integrity of Sweden and NATO allies. Russian submarine contacts in the Baltic have become near-weekly occurrences, but this public release of imagery tracking a specific vessel through the strategic North Sea-Baltic chokepoint signals growing Swedish assertiveness within NATO.

Analysis
The public release of Gripen-submarine imagery is a deliberate transparency signal: Sweden is advertising its ISR capability in the Kattegat chokepoint less than two years after NATO accession. The Kilo-class Novorossiysk (B-261) is a conventionally powered boat that must transit on the surface through the shallow strait, making it detectable but also suggesting Russia is prioritizing intelligence collection in the Baltic over operational stealth. This should be read alongside the UK's exposure of GUGI submarine operations near undersea cables; Russia is probing NATO's maritime infrastructure across multiple theaters simultaneously.

2 sources

Swedish Armed Forces Release Photo Showing JAS 39 Gripens Escorting Russian Kilo-Class Submarine - The Aviationist
Swedish Gripen Jets Intercept Russian Submarine in Kattegat Strait - Kyiv Post