UFC 4-150-06
12 December 2001
5-6.1.9.3
There are three depth classifications of check ranges based on class of
ship:
Minesweeper shallow (9.1 m (30 ft))
Medium depth (16.8 m (55 ft)); and
Deep (25.9 m (85 ft))
There are now 6 Forward Area Combined Degaussing and Acoustic
Ranges (FACDAR) for forward deployed areas where no permanent ranges are
available.
5-6.1.9.4
In order to deal with magnetic silencing facilities for degaussing and
deperming purposes, it is necessary to design with dredging in mind. If the facilities are
already in place, a dredging method, which will not impact the facilities, must be
chosen.
5-6.1.10
Seismic Loading. Coastal projects constructed in regions known to
experience seismic activity may need to consider potential impacts related to ground
deformation and severe liquefaction. Seismic loading may also be a concern in design
of confined dredge material berms (subaerial) and caps (subaqueous) where
liquefaction could release contaminated sediments. CEM Section VI-3-4 provides
further guidance.
5-6.1.11
experience annual ice formation during portions of the year. Thus, in project planning
stages, it is important to determine if the presence of ice adversely impacts the project
functionality; furthermore, during design, it is important to consider the effect that ice
loads and impacts might have on individual coastal project elements. CEM Sections VI-
3-5, and EM 1110-2-1612, Ice Engineering, provide further guidance. Chapter 10 of the
Report on Ship Channel Design provides a cursory view of design of channels with ice
cover, locks, erosion and sediment movement, and vibration and mitigation of ice
problems in channels (ASCE, 1993).
5-6.1.12
Debris Entering Harbors. Marine debris entering harbors is composed
of a broad range of materials, which include litter (e.g., aluminum cans, plastic pieces,
glass pieces, and cigarette butts), waste (e.g., medical, galley, operational, and
sewage), and wood from branches from trees and other inland vegetation. As such, it
can interfere with harbor operations. Assessment and strategies to reduce marine
debris in the coastal and ocean environment can be accomplished by managing uses
and activities that contribute to the entry of such debris. Existing regulations include,
but are not limited to, prohibiting littering and dumping of debris and discharging
pollutants in near shore waters. Harbor activities are also subject to the same rules and
statutes relating to debris control.
5-6.1.13
Drydocks. This subject is covered in detail in MIL-HDBK-1029.
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