Denmark’s Volunteer Spy Planes Transform Baltic Security

Opuere Odu

Writer

January 29, 2026
2:58 pm

Denmark’s volunteer Air Home Guard has successfully deployed two state-of-the-art Twin Otter surveillance aircraft over the Baltic Sea during their first year of operations, completing 19 missions as part of NATO’s Baltic Sentry initiative. With a third aircraft arriving in summer 2026, the volunteer force will significantly expand monitoring capabilities across Denmark’s borders and the Mediterranean.

Modern Surveillance Takes Flight Over Baltic Waters

The small Twin Otter aircraft shakes as it throttles up on the runway at Roskilde Airport before lifting off toward Køge Bay. Inside, a pilot, co-pilot, and Mission System Operator work together to operate advanced surveillance equipment that makes these aircraft exceptional tools for national security.

One year has passed since the Air Home Guard received two new Twin Otter aircraft to replace aging Defender planes. The goal was clear: strengthen Denmark’s security at a time when threats to the nation have grown significantly. By increasing surveillance of ships in the Baltic Sea, these aircraft support Baltic Sentry, a NATO initiative protecting critical infrastructure in the region. So far, the mission has proven successful.

As the plane cruises over the water, the Mission System Operator, known only by his call sign “HAN” to protect his identity, selects a merchant vessel for closer inspection. The improved sensor package allows the camera to zoom in from great distances, checking details like the ship’s name and IMO number for identification purposes.

Enhanced Capabilities Transform Baltic Security

If anything appears suspicious about a vessel, the crew photographs it thoroughly and files a detailed report. This capability represents a significant upgrade from previous equipment. The new aircraft can remain airborne 50 percent longer than their predecessors while carrying far superior surveillance technology.

During their first year of operation, the Twin Otter aircraft completed 19 missions specifically for Baltic Sentry. According to Colonel Dennis Thagaard, commander of the Air Home Guard, demand for these missions has grown noticeably. The new aircraft solve this critical task even more effectively than before, making them increasingly valuable to overall defense operations.

Colonel Søren Andersen, chief of the National Air Operations Center, confirms that these volunteer-operated planes fill a crucial gap. Two years ago, this mission didn’t exist. When it emerged, the Defense Force naturally used its own aircraft. However, military leadership recognized that the Air Home Guard and their planes excel at this particular task because they can remain airborne for extended periods, cover large areas, and observe and report effectively.

Year One Operations By The Numbers

Beyond Baltic Sentry work, the Air Home Guard’s operational tempo has been impressive. The two Twin Otter aircraft completed 48 missions for the Defense Force overall, including the 19 Baltic Sea surveillance operations. They also flew 38 missions supporting police operations and conducted four fishery inspections. In November, one aircraft deployed to the Mediterranean for 125 flight hours supporting Frontex, the European border agency monitoring human trafficking and drug smuggling between continents.

Expanding Mediterranean Presence

The Air Home Guard traditionally contributes one to two months annually to Frontex operations. With a third aircraft joining the fleet in summer 2026, Colonel Thagaard expects this contribution could expand to four months per year, depending on political decisions and Frontex requirements.

Meanwhile, the additional aircraft will enable more surveillance missions within Denmark’s borders. Together, the three planes will fulfill an important operational requirement, according to Alexander Høgsberg Tetzlaff, a military analyst at the Center for Military Studies at the University of Copenhagen.

These aircraft can operate day and night, fly slowly over targets, and remain airborne longer than helicopters. As a result, the resources required to maintain this capability are relatively small compared to the operational value they provide.

Volunteers Power Critical Missions

Squadron 270, which operates the current two aircraft from Roskilde and Aalborg airports, consists of approximately 80 volunteer soldiers. These dedicated individuals average around 400 hours of voluntary service annually, though pilots typically contribute significantly more time.

The pilot known by call sign “JOK” logged 1,908 hours with the Air Home Guard in 2025. He serves as both a pilot and deputy commander while working as a self-employed IT professional in civilian life. His flexible work schedule allows him to dedicate substantial time to volunteer service.

Co-pilot “RUC” originally trained as a military pilot before transitioning to charter operations. He contributed nearly 1,000 hours last year, including a paid deployment supporting Frontex. For him, flying represents more than just a mission. As they used to say in the Air Force, flying is the most fun you can have with your clothes on.

No Shortage of Qualified Volunteers

Despite the demanding time commitment, recruiting qualified personnel for the third aircraft presents no challenges. Colonel Thagaard reveals that the Air Home Guard has maintained pilot waiting lists for years. The organization simply lacked capacity within its structure to accommodate all interested volunteers. The third aircraft will finally provide positions for many qualified applicants, including Mission System Operators.

After completing a training exercise over Køge Bay, the Twin Otter barely touches down before taking off again on an operational mission. The crew politely declines to reveal any details about their classified assignment. This seamless transition from training to operations exemplifies the professional capabilities these volunteer forces bring to Denmark’s national security apparatus.

Strategic Value in Uncertain Times

The Air Home Guard’s enhanced surveillance capabilities arrive at a critical moment for regional security. The Baltic Sea has become an increasingly important strategic area requiring constant monitoring of maritime activities. NATO’s Baltic Sentry initiative recognizes this reality by coordinating multinational efforts to protect undersea cables, pipelines, and other infrastructure vulnerable to interference or sabotage.

Naturally, Denmark’s geographic position makes these volunteer surveillance operations particularly valuable. The aircraft can quickly respond to developing situations while freeing up military assets for other priorities. Their ability to photograph vessels, identify suspicious activities, and maintain persistent surveillance over vast ocean areas provides decision-makers with crucial intelligence.

Interestingly, the Twin Otter platform proves ideal for these missions despite being relatively simple aircraft. Their reliability, extended flight times, and ability to operate from shorter runways at regional airports make them more practical than faster but more expensive alternatives. The advanced sensor packages transform these workhorses into sophisticated intelligence-gathering platforms.

As Denmark continues strengthening its defense posture, volunteer forces like the Air Home Guard demonstrate how citizen soldiers can meaningfully contribute to national security. Their professional execution of complex surveillance missions proves that dedication and proper equipment can create capabilities rivaling full-time military units. With the third aircraft arriving next year, this small but capable force will play an even larger role protecting Danish interests at home and abroad.