true horizontal

true horizontal

A horizontal plane passing through a point of vision or a perspective center.
References in periodicals archive ?
FH plane variation to true horizontal plane varies around zero degrees.3,5
It provides true horizontal distance to the target, allowing you to aim with the right pin--simple but important stuff.
Not only will this rangefinder dish out line-of-sight distance measurements, but an onboard thermometer, inclinometer, and air-pressure gauge combine forces to give you an astonishingly accurate true horizontal distance at any range.
For a chance at catching a true horizontal skimmer--a rare but truly remarkable sight--you can begin watching even a little before a shower's radiant rises.
ARC Bow Mode delivers the true horizontal distance out to 99 yards, while ARC Rifle Mode provides bullet-drop/holdover in inches, MOA and Mil.
A line drawn perpendicular to the true vertical serves as true horizontal (fig 5).
The EXTReam is a true horizontal rock reamer and comes with two types of teeth with the EXTReam: a pointed tooth for softer rock, and a rounded tooth for harder rock.
The existence of significant differences in the relationship between the maxilla and the mandible as determined by the ANB angle and by the linear projection of points A and B in a true horizontal line has been observed.
The true horizontal width of this newly discovered zone of kimberlite increases north-south dimension of the Renard 2 pipe to 150m at a depth of 500 meters below surface.
"Glide has been widely recognised in the industry as having successfully demonstrated the possibility of a true horizontal cross computing platform that ushers in a new era of compatibility and integration," said Leka.
Levels measure true horizontal (level) and true vertical (plumb) either with vials (spirit levels) or sensors (electronic levels).