The Icelandic Coast Guard (Icelandic: Landhelgisgæsla Íslands, Landhelgisgæslan or simply Gæslan) is the Icelandic defence service responsible for search and rescue, maritime safety and security surveillance, national defense, and law enforcement. The nautical division is based at the port of Reykjavík, as well as a smaller base at Siglufjörður. Its aeronautical division is based at Reykjavík Airport.
The Coast Guard is also responsible for the NATO area at Keflavík Airport and the Iceland Air Defence System, which conducts ground-based surveillance of Iceland's air space. It is also conducts hydrographic surveys and nautical charting.