Sailor 100, Training, Installation & Service Manual

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Site preparation
3-6 Chapter 3: Installation 98-137654-A
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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SAILOR100TM.book Page 6 Tuesday, January 29, 2013 2:44 PM