rod level

rod level

[′räd ‚lev·əl]
(engineering)
A spirit level attached to a level rod or stadia rod to ensure the vertical position of the rod prior to instrument reading.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

rod level

An accessory for use with a leveling rod or a stadia rod to assure a vertical position of the rod prior to instrument reading.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The highest ROD level obtained by Bank BJB Syariah in 2015 amounted to 11.06% while the smallest ROD level of Maybank Syariah Bank in 2012 amounted to 2.47%.
Basically, with the rod butt wedged in your stomach, and keeping the rod level out over the water, a technique of slow, short but powered pulls--raising the rod about 15 degrees from the horizontal--followed by a quick drop and fast few turns of the reel to gain lost line--is the best.
The rod holder can control this error by using a rod level or by rocking the rod.