Site preparation
98-133966-G1
Chapter 3: Installation
3-7
3333
Installation
3.2.5
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 3-5: 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
KPD[
SAILOR900TM.book Page 7 Monday, September 16, 2013 11:01 AM
Содержание Sailor 900 VSAT
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