Leupold GX-5i Operating Instructions Manual page 17

TRUE GOLF RANGE (TGR)
True Golf Range is an adjusted range that will compen-
sate for uphill shots that play long and downhill shots
that play short. TGR is calculated from the line of sight
distance, incline or decline, current temperature and
altitude, and will display the adjusted range the golfer
should play to. For example, if you have a lie 150 yards
from the pin, but the green falls 6 degrees above your
ball, you should play the shot as if it were 164 yards.
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