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4-3
Figure 4-4 Marks and data appearing in the history display
mode
Permanently Displayed Marks and Data
Range Data
Shows the range scale set with the RANGE control.
Tilt Angle Data
Mark/Data Description
Trackball Mark Data
→
↓
B
Trackball mark data:
: Slant range
→ : Horizontal range
↓ : Depth
B : Bearing
Bearing is shown in 360° or ±180° indication system, relative to ship’s
heading. In the latter case, "B" is indicated as follows:
B
P.... on the port side
B
S.... on the starboard side
→
→
R
T
°
°
(
)
The tilt angle appears below the range. The tilt angle can be changed in
1° steps within the range of -5° to 60°. In *target lock and automatic
tilt control, the instantaneous tilt angle appears in parentheses.
Accordingly, both are equal when target lock is on. In automatic tilt,
the upper indication shows the tilt angle set by the TILT lever and the
lower indication the instantaneous tilt angle at which the sonar actually
works.
(Continued on next page)
History display
*Requires external sensor.