UNITED24 - Make a charitable donation in support of Ukraine!


USS CHEYENNE SSN-773 Department & Divisions


The Combat Systems Department is divided into four distinct divisions: Torpedo, Fire Control, Sonar and Deck. The personnel in each of these divisions are responsible for ensuring that the Weapons System is always maintained in a condition of maximum readiness.

The Submarine Advanced Combat System AN/BSY-1 is the latest in technology, combining the Sonar and Fire Control Systems. The Sonar portion, utilizing advanced array systems, can detect, classify, and track multiple contacts at extreme ranges under adverse conditions. The Fire Control portion provides weapons orders, as well as targeting information to the ship's four torpedo and twelve vertical launch tubes. The CHEYENNE carries the latest variety of advanced submarine weaponry, including the MK 48 Advanced Capability Torpedo, The Harpoon Anti-Ship Missile and the Tomahawk Cruise Missile.

The Torpedo Division is manned by Machinists, who stand their watch in the Torpedo Room. These personnel are required to have a detailed knowledge of the torpedo tubes, vertical launch tubes and the various weapons carried on board CHEYENNE. The Fire Control Technicians operate and maintain the systems associated with the ship's approach and attack capabilities.

The only non-technical division in the Combat Systems Department is the Deck Division, which is comprised of junior personnel responsible for maintaining the topside portion of the ship. They are charged with maintenance of the material integrity of the ship's structure, as well as painting and preservation of the ship's exterior


The Engineering Department aboard CHEYENNE is divided into five distinct divisions: Auxiliary, Electrical, Machinery, Reactor Controls and Reactor Laboratory Divisions. The personnel in each of these divisions are responsible for the ship's propulsion systems, in order to support all underways.

The propulsion plant of a nuclear-powered ship is based on use of a nuclear reactor to provide heat. The heat comes from the fissioning of nuclear fuel contained within the reactor.

Auxiliary Division personnel are responsible for the operation, maintenance, repair and overall readiness of ship's support systems, including hydraulics, air systems atmosphere control, trim and drain, emergency diesel engine and all shipboard damage control equipment.

Machinery Division personnel are responsible for maintaining the ship's main propulsion plant, including secondary plant steam and auxiliary support systems.

Reactor Laboratory Division personnel maintain the reactor and steam plant, conduct radiological surveys and monitor the radiological exposure of the ship's personnel.

Electrical Division personnel operate and maintain the electrical power plant and associated equipment, including all electrical power-generating, storage and distribution systems as well as auxiliary electrical systems and equipment.

Reactor Controls technicians ensure proper operation and maintenance of reactor controls equipment, protective systems and associated instrumentation.


The Executive Department consists of three components: The Chief of the Boat (COB); Yeoman, and Management and Material Maintenance Coordinator (3M). Their function is to assist the Executive Officer in the discharge of his administrative responsibilities.

Chief of the Boat is the principal enlisted advisor to the Commanding Officer in order to keep the command aware of existing or potential situations, procedures and practices which affect the welfare, morale, job satisfaction and use of enlisted members. As such, The Chief of the Boat reports directly to the Commanding Officer, orally, and/or by written report. In addition, the COB is the Administrative Assistant to the Executive Officer, supervising certain activities affecting the crew as a whole.

The Yeoman are assistants to the Executive Officer for personnel, clerical and stenographic matters. They serve under the Personnel Officer. The yeoman are responsible for preparation and handling of all incoming and outgoing correspondence, maintaining officer and enlisted personnel records, preparation of routine personnel reports, maintenance of a complete library of manuals and instructions, and act as personal contact point for crew members in regard to administration and disbursing matters, to include but not limited to transportation arrangements, shipment of house hold goods and pay.


The Navigation and Operations Department, although having distinct and different purposes, are under the direct supervision of one officer. This department is composed of the Navigation Electronics, Radio, Interior Communications and Quartermaster divisions.

Navigation Electronics Technicians are responsible for ensuring the ship's position is accurately known. This is done by using the Electrostatic Gyro Navigator (ESGN). By using this highly accurate and completely independent navigation system, missile firing parameters for cruise missiles are maintained 24 hours per day to support strike operations as ordered by Battlegroup Commanders. Navigation Electronics Technicians also operate and maintain the radar and electronic surveillance equipment. In addition to navigation required to support the Weapon system, the Navigation Department is also charged with the responsibility of safely navigating the ship through coastal and restricted waters when proceeding to and from port. This form of navigation is performed via conventional means, such as radar and piloting using the ship's two periscopes and is accomplished by the Quartermasters. Radioman are charged with the responsibility of maintaining communications with Battlegroup and Type Commanders. In addition to this primary purpose, the Radio Room also processes family-grams (a 40-word personal message to each crew member from friends and family) and wire news service, keeping the crew members informed of the latest news back home.


The Medical Department is responsible for maintaining the crew's health. This involves performing routine physical examinations, conducting daily sanitation inspections and supervising the quality of drinking water, food and air. The Medical Department is prepared at all times to cope with any medical emergency. All necessary medications and supplies are available to manage anything from a simple headache to major surgery. The Medical Department is manned by a senior Hospital Corpsman who is specially trained to work in a submarine environment independent of a Medical Officer.


The Supply Department handles logistics and support functions common to all ships. Supply personnel must accomplish these functions despite limited space and with approximately one-third of the number of men assigned to a Supply Department aboard a surface ship, such as a destroyer. The department consists of the Culinary and Stores Divisions.

Mess Management Specialists order, receive, inspect and stow provisions. They plan menus and prepare meals. These men must uphold the reputation of the Submarine Force for outstanding meals. In general, the Storekeepers requisition, receive, stow and issue spare parts required for maintenance of shipboard equipment. They are also responsible for filing, conducting inventories and managing operating funds.

Join the GlobalSecurity.org mailing list

Page last modified: 05-07-2011 01:55:22 ZULU