Revealed: The secret emergency codes UK airport and London Underground use

Code Bravo, Code Red, Operation Bright Star and Inspector Sands and more: What do they mean?

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Many travellers have likely heard announcements such as Code Bravo while wandering around the airport .

But what does Code Bravo and others like it mean?

Whether it becruise ships , London Underground workers, airport staff or your regular security officers, our lives are full of instances when we overhear these secret and clandestine codes.

Experts have lifted the curtain on the codes that travellers or commuters aren't supposed to know - and some of them are harrowing or humorous.

Credits: Birmingham Post and Mail

Birmingham Post and Mail

Airports

A general security alert will be raised via Code Bravo, the Telegraph reported.

Code Adam may be used to alert staff of a missing child.

Mayday, meanwhile, means an aircraft or ship is facing imminent danger.

The code 7500 is a transponder code which means an aircraft has been, or is threatened with, hijacking.

While 7700 is a more general emergency code, 7600 indicates a radio failure.

Cabin crew, meanwhile, will use "arm and crosscheck" - meaning, prior to departure, the plane exits are put into emergency mode.

"Hat bin" is a term for overhead bins, while "hot bit" refers to the heated part of an in-flight meal.

A rubbish bag is actually a "gash bag" and plonkey kits are a bag of essentials carried by flight attendants.

A pilot will refer to his "flight level" - which is how many thousands of feet above sea level you are - and his "deadhead", a pilot or flight attendant who is one repositioning as part of an on-duty assignment.

Cruise ship codes

The announcement Operation Bright Star signals a medical emergency.

Operation Rising Star, meanwhile, means a passenger has passed away.

Code Red - rather than being a death - is an outbreak of norovirus or illness.

Similarly, Code Green and Code Yellow indicate less severe illness-related problems.

Oscar, Oscar, Oscar - rather than them demanding an Academy Award - means a man has gone overboard.

Similarly, Charlie, Charlie, Charlie is a security threat, and Echo, Echo, Echo a possible collision with another ship, or in other cases a warning of high winds.

Red Parties means a possible fire on board, Bravo, Bravo, Bravo another serious incident, Delta is damage to the ship and Priority 2 is a leak.

Credits: Getty

Getty

London Underground

The best known code is Inspector Sands, or simply Mr Sands, which refers to a potential emergency such as a fire or bomb scare.

The numbered codes - Code 1, 2, 3 etc - refer to cleaning jobs, rather than anything sinister.

Code 1 means blood, whereas 2, 3 and 4 mean urine, vomit and spillage respectively.

Code 5 is used to signify broken glass, while 6 and 7 is little and anything else that doesn't fit into the categories.