The Fighter-406 Katana is the primary heavy fighter craft of the UNSC, replacing the earlier longsword. The Katana, while smaller than the Longsword, carries similar capabilities in terms of weapons, speed and armour, while improving on agility, stealth capabilities and avionics. The Katana represents the premier strike capability of the UNSC Navy, capable of engaging enemy fighters and capital ships with impunity, while also striking ground targets.