List of naval ship classes in service
The list of naval ship classes in service includes all combatant surface classes in service currently with navies or armed forces and auxiliaries in the world. Ships are grouped by type, and listed alphabetically within. For other vessels, see also: FREMM multipurpose frigate (multiple classes) "Hamilton"–class cutter Cyclone-class patrol boat -class patrol boat The "Osprey"-class is a subclass of the Mine warfare vessels. Minesweepers. TROIKA PLUS: This system employs up to four remote controlled Seehund (sea dog or seal) drones which perform the sweep. The drones are small unmanned boats that can  simulate the acoustic and magnetic signatures of bigger ships to trigger mines. Their small size and special construction let them survive the effects of exploding mines unharmed. "Seehund" can be controlled remotely or manually by an onboard crew (usually 3) for maneuvering in harbours or in training (the Seehund is too large to be carried by Ensdorf class vessels). A life raft is carried for this reason.