Smesta

An imaginary straight line from gun to target.

A ground line established to delimit bombardment by friendly surface ships.

A line at which troops, after having reached it, must report to their command echelon.

A line on a map, diagram, or overlay joining all points at which the radiation dose rate at a given time is the same.

A line established by competent authority identifying the area contaminated to a specific level of the contaminant of interest.

Within an assigned area of operations, a line established by a land or amphibious force commander to denote coordination requirements for fires by other force elements which may affect the commander’s current and planned operations. The fire support coordination line applies to fires of air, ground or sea weapons using any type of ammunition against surface or ground targets. The establishment of the fire support coordination line must be coordinated with the appropriate commanders and supporting elements. Attacks against surface or ground targets short of the fire support coordination line must be conducted under the positive control or procedural clearance of the associated land or amphibious force commander. Unless in exceptional circumstances, commanders of forces attacking targets beyond the fire support coordination line must coordinate with all affected commanders in order to avoid fratricide and to harmonize joint objectives. Note: In the context of this definition the term "surface targets" applies to those in littoral or inland waters within the designated area of operations.

A line selected, if possible, to follow well-defined topographical features and used to delineate levels of protective measures, degrees of damage or risk to friendly troops, and/or prescribe limits to which the effects of friendly weapons may be permitted to extend.

In a campaign or operation, a line linking decisive points in time and space on the path to the centre of gravity.