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A dial telephone system with a battery backup will not meet the USCG Regulations as they currently exist. Other uses for sound-powered telephone technology today include emergency communications systems for high-rise buildings, draw bridges, ski lifts, and temporary locations where reliable communication is necessary.
USCG Rescue 21 antenna tower at Cape Hatteras National Seashore. Rescue 21 is designed to be more robust, reliable, and capable than the legacy system by using a modern radio system coupled with a TCP/IP network, and digital communication using VoIP.
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.
The same basic concept was also tested post-war by the Coast Guard in a system known as "Skywave Long Baseline LORAN". The only difference was the selection of different frequencies, 10.585 MHz in the day, and 2 MHz at night.
The US Coast Guard uses this system to track vessels in Prince William Sound, Alaska, Vessel Traffic Service. IMO and the USCG also plan to require ships carry a Universal Shipborne automatic identification system , which will be DSC-compatible.
For long-range communications with aircraft, Coast Guard stations use shortwave single-sideband communications. Weather and safety of navigation forecasts involve facsimile as well as other modes over shortwave and mediumwave transmissions. According to the NTIA, the Coast Guard is the seventh-biggest user of radio spectrum in the United States.
The SA366 G1 Dauphin version was selected by the United States Coast Guard in 1979 as its new short range recovery (SRR) air-sea rescue helicopter, replacing the Sikorsky HH-52A Sea Guard. In total 99 helicopters, optimised for the USCG's search and rescue role tasks and given the designation HH-65A Dolphin, were acquired.
Any Coast Guard crew with officers or petty officers assigned has law-enforcement authority (14 USC Sec. 89) and can conduct armed boardings. The Coast Guard operates 243 Cutters, [2] defined as any vessel more than 65 feet (20 m) long, that has a permanently assigned crew and accommodations for the extended support of that crew. [3]