Sailor 100, Installation Manual

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Site preparation
3-6 Chapter 3: Installation 98-136280-B
3.2.4 Ship motion and offset from the ship’s motion centre
Even though it is recommended to mount the ADU high, keep the distance between the
ADU and the ship’s motion centre as short as possible. The higher up the ADU is
mounted, the higher is the linear g force applied to the ADU. The g force also depends
on the roll period of the ship, see Table 3-1. If the g force applied is too high,
performance and ADU signal stabilization may be reduced and eventually the ADU may
be damaged. Refer to the following table for allowed mounting heights above the
ship’s motion centre.
Figure 3-4: Maximum distance from the ship’s motion centre (h max)
Min.
roll period
Max. ADU mounting height (h max)
Full performance Potential risk of damage
4 s 12 m 16 m
6 s 27 m 35 m
8 s 48 m 62 m
10 s 75 m 98 m
Table 3-1: Maximum distance from the ship’s motion center versus ship’s
roll period
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