11
MODES OF OPERATION - ANGLE MODIFIED RANGE (AMR) AND LINE OF
SIGHT (LOS)
Angle modied range is the equivalent horizontal range to the target and is comparable to the
“horizontal leg” of a triangle. AMR is also known as “rieman’s rule” and uses the LOS range and
angle of incline to calculate the horizontal distance the projectile travels between shooter and
target. AMR is very accurate for shorter distances (i.e. < 400 yards) and archery.
Line of sight is the range to the target independent of angle. It is comparable to the “hypotenuse”
of a triangle. When ranging in LOS mode, the distance is displayed in addition to the angle of
incline. This method is preferred for those long range shooters and hunters wanting to use the
LOS range and angle of incline to calculate a very precise holdover using a ballistic calculator
smartphone application and/or wind measurement device.
For example, if the rangender is in LOS mode the line of sight range of 500 yards would be
displayed along with the angle of -30 (degrees decline). Use LOS in combination with a ballistic
calculator to calculate an exact holdover in minutes of angle or milliradians.
If the rangender is in AMR mode the angle modied range of 433.0 yards would be displayed.
This is the equivalent horizontal range and can be used in combination with a ballistic / holdover
reticle or with the SIG Ballistic Turret SBT™ dial.
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