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  2. Vessel emergency codes - Wikipedia

    en.wikipedia.org/wiki/Vessel_emergency_codes

    Man overboard can also be signaled with three prolonged blasts on the ship's whistle and general alarm bell (Morse code "Oscar"). [4] Mr Skylight paged over the PA system is an alert for the crew on board and means there is a minor emergency somewhere. [6] [7] Oscar, Oscar, Oscar is the code for man overboard aboard Royal Caribbean and ...

  3. Emergency position-indicating radiobeacon - Wikipedia

    en.wikipedia.org/wiki/Emergency_position...

    Overview diagram of COSPAS-SARSAT communication system used to detect and locate ELTs, EPIRBs, and PLBs First generation EPIRB emergency locator beacons. An emergency position-indicating radiobeacon (EPIRB) is a type of emergency locator beacon for commercial and recreational boats, a portable, battery-powered radio transmitter used in emergencies to locate boaters in distress and in need of ...

  4. Astro (Motorola) - Wikipedia

    en.wikipedia.org/wiki/Astro_(Motorola)

    The Original ASTRO 25 format utilizes APCO Project 25 Phase I technology (FDMA). It is the most used format of the ASTRO 25 family of radio systems. The ASTRO 25 Phase II system, which complies with the P25 Phase II standard, uses TDMA technology to deliver two voice channels over a single wireless trunking channel. [4]

  5. AMSAT - Wikipedia

    en.wikipedia.org/wiki/AMSAT

    AMSAT is a name for various amateur radio satellite organizations worldwide. In particular, it often refers to the Radio Amateur Satellite Corporation, headquartered in Washington, D.C. AMSAT organizations design, build, arrange launches for, and then operate (command) satellites carrying amateur radio payloads, including the OSCAR series of satellites.

  6. Amateur radio satellite - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_satellite

    First amateur radio satellite OSCAR 1, launched in 1961 Simple OSCAR beacon signal, 1962. The first amateur satellite, simply named OSCAR 1, was launched on December 12, 1961, barely four years after the launch of the world's first satellite, Sputnik I. The satellite had to be built in a very specific shape and weight, so it could be used in ...

  7. Emergency Alert System - Wikipedia

    en.wikipedia.org/wiki/Emergency_Alert_System

    The Emergency Alert System (EAS) is a national warning system in the United States designed to allow authorized officials to broadcast emergency alerts and warning messages to the public via cable, satellite and broadcast television and AM, FM and satellite radio. Informally, Emergency Alert System is sometimes conflated with its mobile phone ...

  8. Emergency override system - Wikipedia

    en.wikipedia.org/wiki/Emergency_override_system

    The Local Access Alert (also known as Local Access System or Emergency Override System) is a system designed to warn radio stations, television stations, cable television broadcast feeds or satellite signals of impending dangers such as severe weather and other civil emergencies.

  9. OSCAR protocol - Wikipedia

    en.wikipedia.org/wiki/OSCAR_protocol

    In fact, AOL expands on the general concept of OSCAR, adding systems for service-side buddy lists and icons, as well as features for file transfers using Bonjour. On March 6, 2006, AOL released the AIM SDK and launched a developer website, allowing developers to build plugins for AIM Triton , and build their own custom clients, which connect ...