![]() There are actually 27 time zones recognized by most oceangoing vessels, and some of these time zones aren’t exactly an hour apart but are instead only 30 to 45 minutes apart from one another. The international date line is found in the middle of the Pacific Ocean, and while there are 24 hours in a day, there aren’t exactly 24 time zones on the globe. So if there is a five-hour difference in GMT on the East Coast of the United States during February, there will be a six-hour distance between GMT and East Coast during the month of December. When the United States transitioned into Daylight Savings Time, the calculations change accordingly. The existence of Daylight Savings Time can complicate these calculations. The receiver of this message would then have to figure out what the difference between the GMT and their current time zone is to figure out what time it would be in their time zone when the event occurs. If a military communication stated that something would happen at 1500Z, the event would occur when it is 3 PM in Greenwich, England. ![]() These special times and designations are necessary because just as civilians must account for the differences in time between the different areas, military operations, bases, and personnel must also account for these differences. The military also references the GMT with the Z/Zulu Suffix. The GMT is the standard that the other time zones are separated from. You may know that the civilian time zones are based on Greenwich Mean Time or GMT. Incidentally, Greenwich Mean Time is given the designation below Zulu for zone Z. For instance, the time zone R/Romeo refers to US Eastern Standard Time, UTC-5. Military timekeeping systems also use their own time zones, which are assigned a letter from the NATO phonetic alphabet to distinguish them from one another. So 8:45 AM would be written down as 0845, said as “zero eight forty-five”. For instance, when noting the time, preceding zeros must be written out or spoken. However, most military timekeeping systems, such as the system used by the United States military forces, have unique characteristics that separate them from other 24-hour clock systems. ![]() Most computer systems also use the 24-hour notation by default, and will only use the 12-hour notation if the user has chosen to do so or activate the 12-hour notation by default if the region setting matches one of a few specific regions.Įnglish-speaking countries may refer to the 24-hour clock system as military time, reflecting in the usage of the system by the military in contrast to the 12-hour system used by the general public. For instance, in Japan, some clubs or bars may advertise that they are open until the 30th hour, or 6 AM because the closing time is lumped in with that previous day’s business. However, these are exceptions to the rule and such notations are not commonly used. Very rarely, time notations beyond the 24th hour in a day are used, for example, when a particular business day of a company extends beyond midnight. That said, many style guides and military communications manuals advised the use of 23:59 or 00:01 instead of 24:00. Using the 24-hour system, 24:00 can easily be used to refer to the end of one day and 00:00 the start of another day. This also helps to avoid ambiguity, as in the 12 hour system, it isn’t clear whether or not midnight should be referred to as 12 PM or 12 AM. 24:00 is another way that midnight of the end of a given day can be represented. Meanwhile, the final minute of the day is 23:59. Under this system, one day begins at midnight or 00:00. However, since the 24-hour clock runs from 0 to 24, this is unnecessary and therefore the format can simply be HH:mm. To specify a time on the 12-hour clock one would denote it in the following format – hh:mm (AM/PM). Military time/the 24-hour clock differs from the 12-hour timekeeping system in that there is no a.m. Facts About Military Time/The 24-hour Time System The 24-hour clock system is actually the most commonly used timekeeping system in the world, and the ISO 8601 International Standard uses the 24-hour clock. Reading and interpreting a military time chart is easy once you know how the system works. The advantage of using military time/a 24-hour clock is that it lessens any ambiguity that might arise from using the 12-hour clock and having to specify a.m. Rather, the 24-hour clock’s used in military time starts at midnight and then passes through 24 hours a day. Military time is based around a 24-hour clock, instead of the 12-hour clock that is divided into a.m. While it is called military time in the United States, many organizations outside of the military use it. Military time is a system of timekeeping.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |