Alert 1: Minor Difficulty (Standby Only) Alert 2: Major Difficulty (e.g., engine failure) Alert 3: ACTUAL AIRCRAFT CRASH!Alert 4: Bomb, Hijacking, Civil Disturbance, etc.
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Alert 3: Indicates that an aircraft has crashed on or off the airport, or there is a high probability the aircraft will crash, or the pilot has indicated that the aircraft landing gear will not work and, therefore, the pilot will have to crash land on the airport.
Pilots are instructed to land at the nearest possible suitable airport in the event of a Code Red. Hearing Code Red at the terminal typically means there's a confirmed security risk, such as a bomb or terrorist. Airport security and police are almost immediately mobilized to deal with the situation.
One of the most well-known is a 'Code Bravo,' which means that there has been a security breach/threat. In airports, security staff may issue the call 'Bravo, Bravo, Bravo' and order everyone to freeze, to help them identify a suspect.
This is the abandon ship signal used at Celebrity Cruises. Kilo, Kilo, Kilo on Royal Caribbean is a general signal for crew to report to emergency stations. Mr Mob means man overboard. Man overboard can also be signaled with three prolonged blasts on the ship's whistle and general alarm bell (Morse code Oscar).
ICAO code consists of 4 letters. Certain classifications among countries and regions are used in creating these codes. The first letter stands for the region in which the airport is located, the second is for the country. The other two letters are generally given in order.
According to Airfarewatchdog, in the 1930s, it was important to know whether or not an airport had a weather/radio station located on its premises, for safety and landing reasons. If it did, the letter Y for yes was added in front of the existing radio call sign.
Phase V – Aircraft emergency with 30 or more SOB requiring major off-airport emergency resources. Phase V Working Event – A Phase response that turns into an accident event requiring major off-airport emergency resources.
Threshold lights are green color airfield lights, unidirectional type, installed at the beginning of the part of a runway where aircraft can do touchdown. Threshold is not a touchdown point yet. But this is a beginning of 'safe-to-land' part of a runway.