This antenna has been designed and manufactured for marine NVIS operation. Using the antenna, communication can be established in 0 ~ 1000 km distance without skip zone. NVA-211/E is a high efficiency NVIS antenna in the HF frequency band. It is tuned automatically and used where the antenna should be camouflaged. Considering proper base, this antenna can be installed on various boats. In addition, it can be used as a roof rack noting safety considerations. Automatic erecting/lowering is another advantage of the antenna.