The "Narwhal-class" refers to a class of submarines used by the Royal Canadian Navy. These submarines are designed for various missions, including surveillance and reconnaissance, and are known for their ability to operate in Arctic waters. Named after the narwhal, a marine mammal known for its long tusk, the Narwhal-class submarines are equipped with advanced technology to enhance their stealth and operational capabilities. They play a crucial role in Canada's maritime defense strategy, particularly in protecting its vast northern territories.