Based onboard the icebreaker Frej for ice-reconnaissance operations. This service was carried out by Cassel Aero until 2004, after which it was canceled due to the icebreakers new access to live high-resolution satellite images, which covered a larger surface than the helicopters could reach.\r\n\r\nThe photo was taken by Gunnel Ilonen and it belongs to the Swedish Maritime Museum\'s collection (published with permission).