Locating a target line in Peak, or Peak+, mode accurately defines the position of a target line after it has been traced and its position is approximately known. Start with medium output power from the transmitter, medium frequency on the transmitter and locator, and Peak or Peak+ mode on the locator.

Set the locator sensitivity to approximately 50% by pressing the  or key.

NOTE: it may be necessary to adjust the sensitivity level throughout the pinpointing to keep the bar graph on scale.

1. With the antenna perpendicular to the line, make traverses across the line. Define the point of maximum response.
2. Without moving the locator, turn it round as if it is on a pivot. Stop at the point of maximum response.
3. Hold the locator vertical with the antenna just above the ground and move the locator from side to side across the line. Stop at the point of maximum response.
4. With the end of the antenna close to the ground, repeat steps 2 and 3.
5. Mark the position and direction of the line.

Repeat the steps of the procedure to increase pinpoint accuracy.

If using Peak+ mode, switch to null arrows by pressing and holding the key. Alternatively switch to Null antenna mode.

Move the locator to find the Null position. If the position of the Peak and the Null pinpoints correspond, it can be assumed that the pinpoint is accurate. The pinpoint is not precise if the marks do not correspond, but both marks will show an error to the same side. True line position will be close to the Peak position.

The line lies half the distance to the other side of the Peak position as the distance between the Peak and the Null positions.

Pinpointing with Peak and Null indicators

Pinpointing a target line