Site preparation
99-145912-A Chapter 3: Installation 3-7
3.2.5 Ship motion and offset from the ship’s motion centre
When installing the ADU you must consider the mounting height
carefully. 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. See the following table for allowed mounting heights
above 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.
Figure 3-5: Maximum distance from the ship’s motion centre (h max)
Min.
roll period
Maximum ADU mounting height (h max)
Full performance Potential risk of damage
4s 12m 16m
6s 27m 35m
8s 48m 62m
10 s 75 m 98 m
Table 3-1: Maximum distance from the ship’s motion center versus
ship’s roll period
To Next Page
Loading...
Need help?
General
