Military Time, or 24-hour clock time, is a system of telling time based on a 24-hour pattern instead of the traditional 12-hour AM/PM pattern. The idea behind military time is that all hours are designated using a 0-24 numbering system, analogous to the number of degrees in a circle. This ensures that there is no need to remember whether it is "AM" or "PM," as all hours theoretically fall within the same day.
Military time also operates on what's known as "zulu" time, which stems from Zulu, the phonetic alphabet used by NATO forces when communicating times and dates at sea or in midair. With this in mind, let's take an in-depth look at military time and see how it works in minutes.
To begin with, it's important to recognize that there are 1,440 minutes per day and 60 minutes per hour. When expressing times with military terminology, you must use four digits shown in groups of two (e.g., 1100). This first group of two digits represents the hour (in this case 11), and the second group of two represents minutes (i.e., 00). For example: 4:30 p.m equals 1630 hrs when written in military language (16 for 4 p.m., 30 for half an hour).
When working with military time in minutes it can be helpful to use equivalent fractions so as to simplify calculations. For instance, 1530 hrs can be expressed as 3/4 of a day (0:15:00 = 0.25) or as 90 minutes (90/1440). In order to add an additional 15 minutes to a given set of coordinates expressed with military language they should be expressed as fractions instead of decimals (e.g., 0:00:45 + 0:15:00 = 0:01:30; 1/4 + 1/16 = 5/16). Similarly subtracting 15 minutes would look like this (e.g., 0:15:00 - 0+00+45 = 1445 hrs).
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