A graduated line attached to a current pole used in measuring the velocity of the current. The line is marked in such a manner that the speed of the current, expressed in knots and tenths, is indicated directly by the length of line carried out by the current pole in a specified interval of time. When marked for a 60-second run, the principal divisions for the whole knots are spaced at 101.33 feet and the subdivisions for tenths of knots are spaced at 10.13 feet. The current line is also known as a log line.

during text editing sessions, the first line of displayed text, which is terminated by /===/ (as opposed to *===*).

The line point is on ( Section 5.1).