UFC 4-159-03
3 October 2005
Ship waves may be important in some cases. The response of a moored
vessel to wave forcing includes:
a) A steady mean force.
b) First order response, where the vessel responds to each wave, and
c) Second order response, where some natural long period mode of
ship/mooring motion, which usually has little damping, is forced by the group or other
nature of the waves.
If any of these effects are important to a given mooring design, then a six-
degree-of-freedom dynamic of the system generally needs to be considered in design.
Some guidance on safe wave limits for moored manned small craft is given in Table 3-
8(a).
3-8.7
Water Depths. The bathymetry of a site may be complex, depending on
the geology and history of dredging. Water depth may also be a function of time, if
there is shoaling or scouring. Water depths are highly site specific, so hydrographic
surveys of the project site are recommended.
3-8.8
Environmental Design Information. Some sources of environmental
design information of interest to mooring designers are summarized in Table 3-15.
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