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5. MARKS AND DATA
5-2
Description of marks and data on the normal display
P
S
B
B
Trackball Mark Data
°
()
Mark/Data Description
Own Ship Mark
Shows own ship's present position and points in bow direction.
North Mark*
North mark
When a heading sensor is connected, the North mark is displayed and
points to North.
Heading Mark
Heading mark
The heading mark is a dashed line extending from the screen center
to the edge of the outermost range ring and it points in the direction of
ship's heading.
Heading
With connection of a heading sensor, heading is shown 32 compass
points (N, N/NE, etc.). The heading may also be displayed in true
bearing in which case the indication is 360°.
Own Ship Position
Mark
The own ship position mark is entered at own ship's position, with
the EVENT key. 10 marks may be entered.
Trackball Mark
Sets own ship's mark location for off-center display; sets location for
mark input; measures range and bearing. The trackball controls
this mark.
→
↓
B
Trackball mark data: , slant range; →, Horizontal range; ↓, Depth,
B, Bearing. Appears at top left corner of the sonar display.
Relative bearing
Bearing is shown in 360° or ±180° indication system, relative to ship's
heading. In the latter case, "B" isindicated as follows:
.... on the port side
.... on the starboard side
Indication format may be selected with OTHER MARKS on the MARKS
menu.
Range Data
R
Range setting, selected with the RANGE control, appears at top
right corner of the sonar display.
Tilt Angle Data
T
G
F
°
The tilt angle appears below the range indication at the top right corner
of the sonar display. The tilt angle can be changed in 1° steps within
the range of 0° to 55°. 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.
Gain
The gain chosen with the GAIN control appears on the top right
corner of the sonar display.
Function Key Number
Function key number appears at the top right corner of the sonar
display.
* = Requires appropriate sensor.