De Kooy Airfield / Den Helder Naval Air Station

De Kooy Airfield, officially known as Den Helder Naval Air Station (ICAO: EHKD, IATA: DHR), is a military airfield located near Den Helder in the North Holland province of the Netherlands. It serves primarily as a base for the Royal Netherlands Navy and is home to helicopter operations supporting offshore and maritime missions in the North Sea. The airfield also supports limited civilian and commercial aviation activity, including offshore helicopter services connecting the mainland to North Sea oil and gas platforms. Its dual military and civil role makes it an important operational hub in the northern Netherlands. Den Helder is situated at the northern tip of North Holland and the airfield's proximity to the North Sea makes it strategically significant for search and rescue, naval patrol, and offshore support operations.