User's Manual

Table Of Contents
Locating
Locate Points (FLP & RLP) and Locate Line (LL)
Three positions or locations within the transmitter’s field are used to locate the transmitter below ground.
Two of these locations 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 is perpendicular to the
transmitter and is referred to as the locate line or LL.
The figure on the left below shows the geometry of the FLP, RLP, and LL from top (bird’s-eye) and side
views. Note how the RLP and FLP are equal distances from the LL when the transmitter is level and the
ground surface is level.
The figure on the right shows the geometry of the locate points and locate line when the transmitter is at a
negative or downward pitch. Note how, in this case, the RLP and FLP are at different distances from the
LL.
RLP
FLP
Transmitter
LL
RLP
FLP
Ground
Surface
Transmitter
Bird's-Eye View
(Looking Down)
Side View
Axis Line
LL
Drill
Drill
Ground
Surface
Bird's
Eye View
(Looking Down)
Side View
Axis Line
FLP
Transmitter (Negative
or Downward Pitch)
RLP
RLP FLP
LL
Transmitter (Negative
or Downward Pitch)
LL
Drill
Drill
Top and Side Views of FLP, RLP, Top and Side Views of FLP, RLP,
and LL When Transmitter Is and LL When Transmitter Is
Level with the Ground at Negative or Downward Pitch
48 DigiTrak
®
Eclipse
®
Operator’s Manual