'I should point out that Zulu is the NATO phonetic alphabet name for the Z used for the military timezone where the local time is UTC. The U.S. military uses other letters to refer to other timezones.'
Military doesn’t use UT, though, right?
" Short version: the "fundamental" time standards are UT1 and TAI. UT1 is measured by the position of the sun from the Royal Observatory in Greenwich; TAI is measured by atomic clocks." ; TAI gets out of sync with everyday notions of time as measured by the sun and stars. The solution is UTC, which is just TAI plus or minus an integer number of leap seconds, to keep it close to UT1. Greenwich Mean Time technically means UT1, but is commonly used to refer to UTC nowadays.
So, GMT/UTC/Zulu are at times (no pun intended) equivalent. Zulu and UTC are not corrected to DST where GMT is. Further while GMT refers to time established by the position of the sun from the Royal Observatory in Greenwich it is usually called UTC nowadays.
Confused? Now you know why aviation and the military use Zulu, to coordinate or schedule over many time zones. It gets worse going from FAA control to ICAO. Takes a bit to re-familiarize yourself with the terminology and procedures.
If someone asks for map directions it is generally not a good idea to start talking about map datums and geodesics.
WWG1WGA
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)
Thank you, sir.
(But please don’t make me take the quiz.)