Shipboard public address circuits used by the United States Navy
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "1 Main Circuit" – news · newspapers · books · scholar · JSTOR(July 2022) (Learn how and when to remove this message)
This article possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed.(July 2022) (Learn how and when to remove this message)
(Learn how and when to remove this message)
Then-Rear Admiral (lower half) Michelle J. Howard addresses the crew of USS Wasp (LHD-1).
General quarters
A call to general quarters aboard a United States Navy vessel
Problems playing this file? See media help.
1 Main Circuit (1MC) is the term for the shipboard public address circuits on United States Navy and United States Coast Guard vessels. This provides a means of transmitting general information and orders to all internal ship spaces and topside areas, and is loud enough that all embarked personnel are (normally) able to hear it. It is used to put out general information to the ship's crew on a regular basis each day. The system consists of an amplifier-oscillator group which is located in the IC/gyro room, a microphone control station, portable microphones at each control station and loudspeakers located throughout the ship. Control stations for the 1MC announcing system are located at the pilot house, OOD stations on the quarterdecks, aft steering and Damage Control Central area.[1]
During an incident involving a casualty, the 1MC is a communication tool used by DCAs (damage control assistants) to keep ship members alerted and informed of casualty location area, status, and incident response efforts by the DC organization.
The 1MC is divided into smaller sub-circuits, such as officer's quarters and topside. At the option of the officer of the deck, some details are not passed on certain circuits.[1]
The 1MC is also used for transmitting various alarm sounds to alert the crew of specific impending dangers such as an inbound anti-ship missile, chemical attack, collision, or a flight deck crash.
Problems playing this file? See media help. 1MainCircuit (1MC) is the term for the shipboard public address circuits on United States Navy and United States...
A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment...
An integrated circuit (IC), also known as a microchip, computer chip, or simply chip, is a small electronic device made up of multiple interconnected...
The Buddh International Circuit is an Indian motor racing circuit situated at Dankaur, near Greater Noida in Uttar Pradesh. The track shares its name...
In electricity supply design, a ring circuit is an electrical wiring technique in which sockets and the distribution point are connected in a ring. It...
Lusail International Circuit (Arabic: حلبة لوسيل الدولية, sometimes rendered Losail International Circuit) is a motor racing circuit located just outside...
The Monza Circuit (Italian: Autodromo Nazionale Monza; lit. 'National Automobile Racetrack Monza') is a 5.793 km (3.600 mi) race track near the city of...
into subsidiary circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure. Normally, a main switch, and in recent...
Circuit City Corporation, Inc., formerly Circuit City Stores, Inc., was an American consumer electronics retail company, which was founded in 1949 by Samuel...
The Shanghai International Circuit (simplified Chinese: 上海国际赛车场; traditional Chinese: 上海國際賽車場; pinyin: Shànghǎi Guójì Sàichēchǎng), also called the Shanghai...
Circuit of the Americas (COTA) is a Grade 1 FIA-specification 3.426-mile (5.514 km) motor racing track and facilities located in Austin, Texas, in the...
electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram...
An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter...
Instrument amplifier Intercom 1MainCircuit, the shipwide public address system on United States ships Bruce Borgerson (November 1, 2003). "Is it P.A. or SR...
The Circuit des 24 Heures du Mans, also known as Circuit de la Sarthe (after the 1906 French Grand Prix triangle circuit) located in Le Mans, Sarthe, France...
The Las Vegas Strip Circuit is a street circuit around parts of the Las Vegas Strip in Paradise, Nevada, immediately adjacent to Las Vegas, Nevada. It...
Park Circuit is a motorsport street circuit around Albert Park Lake in the suburb of Albert Park in Melbourne. It is used annually as a circuit for the...
and stores and commence their breakaway, a song is played over the 1MainCircuit. The song may be selected by the captain, the officer of the deck (OOD)...
executive departments and government agencies. As a result, the D.C. Circuit tends to be the main federal appellate court for issues of American administrative...
company involved in the design, engineering, and manufacturing of electronic circuit board assemblies and systems, along with supply chain services, primarily...
switches that can connect the load to either or both main conductors, and a fusible switch or circuit breaker and switch that feed a distribution transformer...
the south circuit is in use, and joins onto turn 8 of the maincircuit to form a hairpin turn. Also run clockwise, this circuit is 2.609 km (1.621 mi) in...
Short Circuit 2 is a 1988 American science fiction comedy film, the sequel to the 1986 film Short Circuit. It was directed by Kenneth Johnson and starred...
leading up to and following the main event. Proto-circuit parties in the late 1970s, the precursors of what later became circuit parties, were called disco...
100-lap races on the east circuit, a 1.4 mi (2.3 km) layout which utilizes the pit straight and esses, before rejoining the maincircuit near the Casio triangle...
Global Information
