Displaying Direction Indicators

Direction Indicators let you know the approximate pointing direction of the dome in relation to an established point called “North”. Directions for setting the North Position are covered in Chapter 4.

When enabled, the Direction Indicators appear along the top edge of the display. In addition, a tilt elevation indicator also appears along the left edge of the display. The value of the tilt elevation indicator is relative to the “virtual horizon” of 0° tilt. By default, the display of Direction Indicators is disabled.

Figure 5-3illustrates the locations of the Direction Indicators on the display.

Figure 5-3: Screen locations for Direction Indicators

NE

60

E

Pointing direction

12around the Pan axis (0–359°)

Tilt elevation/declination from Horizontal

In this example, the current pointing position is 60° from North. The tilt elevation is 12° above the virtual horizon. Panning to the left points the dome towards the Northeast. Panning to the right points the dome towards the East. If you tilt below the virtual horizon, the negative values will be displayed along the left edge (for example, –25). The elevation values range from +25° to –90°.

If you pan to a position that corresponds to a well-known navigational heading, the label corresponding to the heading appears in the center position. Figure 5-4illustrates the navigational headings and their corresponding degrees from North.

Figure 5-4: Navigational headings and corresponding degrees from North

 

N

 

NW

0°

NE

315°

 

45°

W 270°

Dome

90° E

 

225°

180°

135°

SW

SE

S

In this illustration, the black circle in the center represents the dome, the dotted circle represents the pan axis, and the arrowheads represent panning the dome to the right.

Configuring Text Displayed On-Screen

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