| 9
Installation | HS80/HS80A/MX575C/MX575D User Manual
Recessed arrow located on
the bottom of the enclosure
Forward motion
Figure 2-3: Alternate orientation and resulting signs of HPR values
Smart GPS compass alignment
The top of the Smart GPS compass enclosure incorporates sight design features to help you
align the enclosure with respect to an important feature on your vessel.
To use the sights, center the small post on the opposite side of the enclosure from you, within
the channel made in the medallion located in the center of the enclosure top as shown in
Figure 2-4 and Figure 2-5. Alignment accuracy when looking through the long site (Figure 2-4)
is approximately +/- 1°, while alignment through the short site (Figure 2-5) is approximately
+/- 2.5°.
Figure 2-4: Long sight alignment Figure 2-5: Short sight alignment
If you have another accurate source of heading data on your vessel, such as a gyrocompass,
you may use its data to correct for a bias in Smart GPS compass alignment within the Smart
GPS compass software configuration. Alternatively, you can physically adjust the heading of
the Smart GPS compass so that it renders the correct heading measurement; however, adding
a software offset is an easier process.
Mounting options
The Smart GPS compass allows for two different mounting options: flush mount and pole
mount.
• Flush mount - The bottom of the Smart GPS compass contains eight M8-1.25 holes for flush
mounting the unit to a flat surface (see Figure 2-6). The eight holes comprise two sets of four
holes. The inner four holes are in the same location as the HS70, allowing you to use the Smart
GPS compass as a drop-in replacement. The outer four holes provide a wider mounting option.
• Pole mount - The bottom of the Smart GPS compass contains a mounting hole (1” thread, 0.9”
depth) for easy pole mounting. Hand tighten until snug (do not over tighten). The set screws
on the long sides of the base (see middle drawing in Figure 2-6) allow you to secure the Smart
GPS compass in place (3/16” Allen wrench not included).
To Next Page
Loading...
Need help?
General
