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2. HORIZONTAL MODE
2-20
2.12.3 Position mode
This mode tracks a stationary position (such as a reef) using position data fed from a
navigator.
Note 1: If the [TARGET] key is operated when using the horizontal/vertical scan
combination mode, the train angle is automatically pointed toward target direction
while the target lock marker is displayed. When target lock is canceled the
previously used train angle is restored.
Further, vertical search (see paragraph 5.3.3) is conducted with the vertical scan
mode settings of range, tilt and display range. Note that the horizontal range
settings of the vertical scan mode cover the horizontal mode range.
Note 2: This mode requires position data. When there is no position data the message
“NO POSITION DATA.” appears for five seconds and tracking is automatically
cancelled. Check the navigator.
Note 3: HORZ RANGE on the VERT menu cannot be adjusted while the position mode is
active. Beeps sound when you attempt to change its setting.
Note 4: The tilt angle must be less than 75 degrees to use this feature.
To use the position mode:
1. Choose POS following the procedure in paragraph 2.12.1.
2. Use the Omnipad to choose the location to track.
3. Press the [TARGET] key.
The message “POS LOCK” appears momentarily at the screen top, the target lock
marker is displayed at the cursor position and the target lock indicator appears at the
top right-hand corner of the screen while tracking (with position data from external
equipment) is occurring. If the position goes out of the display area, target lock is
automatically cancelled and the target lock indicator and target lock marker disappear.
The train range is fixed at 48° and train and tilt are automatically adjusted to track the
position selected. The [SECTOR], [TRAIN], [TILT], [RANGE] and [FULL/HALF] controls
are inoperative during tracking. When you attempt to operate them the message
“TARGET LOCKING NOW” appears, accompanied by the aural alarm.
Target lock indicator
Target lock marker
Target lock indicator
4. To turn off the target lock, press the [TARGET] key again. The message “LOCK END”
momentarily appears, the target lock marker and the target lock indicator disappear
and previously used sector, train and tilt settings are restored. Also, the latitude and
longitude indication now shows current position.