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Police code. A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or ...
Ten-code. Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]
Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.
Commercial and Government Radio Stations of the U.S. (6/30/1927), pages 87–92 7/1/1927 Call letters: Annual Report of the FRC (6/30/1927), pages 55–64 11/1/1927 Frequency: Jurisdiction of Radio Commission (2/1928), pages 14–17 Frequencies from 600 to 1000 kHz 12/1/1927 Frequency: Jurisdiction of Radio Commission (2/1928), pages 10–12
The normal climb values used for determining MCAs in the United States are: 150 feet per nautical mile from mean sea level (MSL) to 5000 feet MSL; 120 feet per nautical mile from 5000 feet to 10,000 feet MSL; and 100 feet per nautical mile at 10,000 feet MSL or above. Illustration showing how MCA is determined.
Marine Corps Association. The Marine Corps Association (often abbreviated MCA) is the professional organization for members of the United States Marine Corps and friends of the Corps. It is known for its publications Leatherneck Magazine and Marine Corps Gazette. As of 2009, MCA became part of MCA&F, the Marine Corps Association & Foundation.
The Los Angeles Police Department (LAPD), the primary law enforcement agency of Los Angeles, California, United States, maintains and uses a variety of resources that allow its officers to effectively perform their duties. The LAPD's organization is complex with the department divided into bureaus and offices that oversee functions and manage ...
The system makes use of 0, 75, 120, 180 and 270 ppm codes using a 50 Hz current. Continuous Automatic Warning System is the cab signaling systems in Ireland. The system makes use of 0, 50, 120 and 180 ppm codes using a 50 Hz carrier current. Additional codes are used on some rapid transit lines.