Vortex Impact 850, Manual, Page: 7 / 11

13 12
8
50
Laser Rangef inder
®
lOs M
Ode
The Impact 850’s LOS (Line of Sight) mode is intended for
rifle shooters who are using slope correcting ballistic drop
data cards, ballistic cell phone applications, or other ballistic
programs and who are shooting at distances beyond 500
yards and with slopes greater than 15 degrees. Most shooters
and archers will not need the LOS mode.
The range number displayed in LOS mode is the actual line
of sight range with no ballistic correction for slope. Most of
the commonly used ballistic devices can provide independent
slope correction for bullet drop data and require actual line
of sight range input. Using the LOS range when calculating
bullet wind drifts under these steep slope/long range
conditions will provide a higher degree of accuracy than using
the HCD range.
To use, simply input the LOS range number into the electronic
device or use the LOS range when referencing ballistic drop
cards with slope correction.
LOS Range
Incline angle
LOS Mode – Using the INC Number
When in LOS mode, an additional number is displayed below
the yardage number. This number is slope shown in degrees.
The slope incline number can be used with drop charts or
field cards to calculate precise bullet drops in mountainous
terrain.