Helicopters land on specially designed flight decks that are located in ships like aircraft carriers, helicopter carriers, frigates, destroyers, corvettes, amphibious assault ships, cruisers, and even more!
In some helicopters, the landing part happens with the help of a special device that connects the deck with the helicopter. The device was made by the Royal Navy of Canada and is named Beartrap. A similar device of the US Navy is called RAST and is integrated into the LAMPS Mk III weapon system.
Besides the stability and accuracy, the device also stabilizes the electrical potential between the helicopter rotors and the deck. The helicopter rotors can create huge electric charges that can harm any of the crew members of the ship that touches the helicopter while landing.
The coaxial rotors are the perfect configuration for naval use, as they are extremely durable against side wings.
The biggest helicopter flight decks on military vessels can accommodate helicopters like the Boeing CH-46 Chinook, which has a total length of 30 meters, although most of the ships can take helicopters up to 20 meters.