Browse Definitions:
Definition

Zulu (Zulu time)

Zulu (short for "Zulu time") is used in the military and in navigation generally as a term for Universal Coordinated Time (UCT), sometimes called Universal Time Coordinated ( UTC ) or Coordinated Universal Time (but abbreviated UTC), and formerly called Greenwich Mean Time. In military shorthand, the letter Z follows a time expressed in Greenwich Time. Greenwich Time, now called Universal Coordinated Time, is the time at longitude 0 degrees 0 minutes - the prime meridian or longitudinal line that separates East from West in the world geographical coordinate system. This line of longitude is based on the location of the British Naval Observatory in Greenwich, England, near London. "Zulu" is the radio transmission articulation for the letter Z.

Traditionally, ship and airplane navigation is conducted using Zulu time. Zulu time is usually expressed in terms of a 24-hour clock using the Gregorian calendar time divisions of hours and minutes.

This was last updated in March 2011

Join the conversation

5 comments

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

What is the relationship between ZULU time and the military phonetic alphabet found here: http://www.militarytime.us/military-alphabet/

Was Zulu time created by the military?
Cancel
Silly explanation, still dont understand
Cancel
The concept of Zulu time was NOT created by the military - per se'. The British originated it and called their little island the center of the universe for Earth's Time Zones; therefore they are ZULU and everyone else adjusts to that time beat from Greenwich England. Navigation at sea requires this as another tool when using the sextant and navigating by the sun and stars. A lost art. I last taught the 3rd mate of tug boat how to do it in 1977 - I quit sailing because as an Able Bodied Seaman I knew more than all the mates that I ever sailed with and lost confidence in their abilities. Being a Ship's Boatswain for decades, one tends to pick up a lot of useful information - if you are the type to absorb information like a sponge. Semper Fi!
Cancel
BTW - I had been ship's captain in another life. Being an actual "Sea Captain" doesn't always denote one's present rank, more their qualifications to take a ship someplace and bring it back. In my case I learned in Vietnam where we had another little twist tossed in - besides the shooting, mines etc. there were NO navigational aids - NONE! So much fun... Semper Fi! (Yeah - that's because I was a Marine first - OK?)
Cancel
Comes into context with aviation, imagine fast jet serviced at 08:00 local in one time zone then travels west and crashes elsewhere at 07:00, good one for lawyers.

Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

SearchSecurity

  • phishing

    Phishing is a form of fraud in which an attacker masquerades as a reputable entity or person in email or other communication ...

  • vulnerability disclosure

    Vulnerability disclosure is the practice of publishing information about a computer security problem, and a type of policy that ...

  • incident response

    Incident response is an organized approach to addressing and managing the aftermath of a security breach or cyberattack, also ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

SearchStorage

  • flash memory

    Flash memory, also known as flash storage, is a type of nonvolatile memory that erases data in units called blocks.

  • NAND flash memory

    NAND flash memory is a type of nonvolatile storage technology that does not require power to retain data.

  • NOR flash memory

    NOR flash memory is one of two types of nonvolatile storage technologies.

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close