An important role of the ship is to act as a headquarters during an amphibious operation. Fearless has accommodation for the Naval Amphibious Group Commander, the Military Commander and their staffs. They work in the Assault Operations Room which has a comprehensive communications system. The ship's operations room is nearby
Communications Department
Army and Navy personnel under the control of two Royal Navy officers and one from the Royal Corps of Signals, work side by side. The communication channels are complicated and numerous, for the command and control of an amphibious operation, requiring contact between the ship and the Theatre Commander - who may be hundreds of miles away - with other ships of the Force; the military force when landed and the helicopters and landing craft.
Seaman Department
There are probably more seaman tasks in the assault ship than in any other warship. In Fearless, the seaman besides manning the guided missile system, the helicopter and landing craft direction organisation and the normal navigation equipment, also works the dock where considerable skill is required to berth and work heavy landing craft in a confined area.
Marine Engineering Department
Is subdivided into ; main machinery; craft boats and domesitc machinery; hydraulics and refrigeration; ballasting machinery; fuels, firemain and fresh-water; watertight integrity
Weapons and Electrical Department
Is responsible for virtually everything electrical in the ship, ranging from missiles to radio, radar, internal communications, lighting, domestic power, cranes and vehicle electrics.
Amphibious Beach Unit
Is a joint unit, with the Royal Navy Royal Marines and Army personnel working together under the command of a Royal Marines captain, and a Royal Engineers officer as second-in-command. About 50 all ranks have the task of controlling the movement of stores, vehicles and personnel over a beach, They also provide assistance to landing craft using the beach and communications from the beach back to the ship. The Army element is equipped to clear minefields, prepare beach units, lay beach roadways and water supplies. There is a small section of Royal Electrical and Mechanical Engineers equipped for vehicle recovery duties. Recovery mechanics are trained divers.
Landing Craft Squadron
Commanded by a Royal Marines Captain. The Squadron consists of some 40 Royal Marines and four Naval ratings. They man the four 85-ton landing craft which are carried in the dock. Each craft can carry two fully stored battle tanks, and can operate independently for considerable periods. Smaller landing craft, which are carried on davits, can each carry more than 30 fully equipped troops.
Air Department
The flight deck is fully equipped for day and night flying and is designed to operate a flight of troop-carrying helicopters. The ship does not carry her own aircraft, but embarks them from other sources, to carry out high speed troop movements or to inaccessible locations.
Supply Department
There are many problems associated with carrying large numbers of soldiers together with the vehicles and equipment. In addition to the normal task of providing stores, goods, pay and services for a ship's company of 550 officers and men. the department is responsible for stores and spares for the landing craft, helicopters of all three services, a variety of army transport, and food for up to 700 soldiers, who may suddenly be embarked.
Education Department
An Instructor Officer is responsible for meteorology. He also assists men studying for naval advancement and for G.C.E.