Aiding the NATO fight against Putin, Denmark will send the deadly Harpoon anti-ship missiles to Ukraine. The Harpoon missile system has a low-level, sea-skimming cruise trajectory with active radar guidance. The venerable Harpoon is an air-breathing cruise missile & is in service with the armed forces of 30+ nations. For hitting targets on land and ships in port, the missile uses GPS-aided inertial navigation. For conventional anti-ship missions (open ocean or near-land), the GPS/INS improves midcourse guidance to target area.