User's Manual

Table Of Contents
Locating
Locate Points (FLP & RLP) and Locate Line (LL)
Two of the three locations used for locating are points that represent extensions of the transmitter. One
point is in front of the transmitter (the front locate point or FLP), and the other is behind the transmitter
(the rear locate point or RLP). The third location is a line that represents the position of the transmitter.
This line, referred to as the locate line or LL, is perpendicular to the transmitter at 0% slope.
RLP
Transmitter
LL
RLP
FLP
Ground
Bird's Eye View
(Looking Down)
Side View
Axis Line
LL
Drill
Drill
Transmitter
Surface of
FLP
Geometry of FLP, RLP, and LL from Top and Side Views
Note how the RLP and FLP are equal distances from the LL when the transmitter is level.
NOTE: If the transmitter pitch exceeds ±30% (or 17°) and/or the transmitter depth exceeds 15 ft
(4.5 m), the position of the locate line will be somewhat ahead of or behind the trans-
mitter’s actual position; the depth displayed on the receiver is referred to as the projected
depth. Refer to Appendix B: Projected Versus Actual Depth and Fore/Aft Offset, for
information regarding this situation.
44 DigiTrak
®
LT2™ Operator’s Manual