interval

Definition: (DOD, NATO) 1. The space between adjacent groups of ships or boats measured in any direction between the corresponding ships or boats in each group. 2. The space between adjacent individuals, ground vehicles, or units in a formation that are placed side by side, measured abreast. 3. The space between adjacent aircraft measured from front to rear in units of time or distance. 4. The time lapse between photographic exposures. 5. At battery right or left, an interval ordered in seconds is the time between one gun firing and the next gun firing. Five seconds is the standard interval. 6. At rounds of fire for effect the interval is the time in seconds between successive rounds from each gun.