3 October 2005
INTRODUCTION. The DOD uses several types of mooring systems to
moor ships. These systems can be summarized into two broad categories of moorings:
a) Fixed Moorings - Fixed moorings are defined as systems that include
tension and compression members. Typical fixed mooring systems include moorings at
piers and wharves.
b) Fleet Moorings - Fleet moorings are defined as systems that include
primarily tension members. Mooring loads are transferred into the earth via anchors.
Examples of fleet moorings include fleet mooring buoys and ship's anchor systems.
The more common types of moorings are discussed in this chapter.
PURPOSE OF MOORING. The purpose of a mooring is to safely hold a
ship in a certain position to accomplish a specific mission. A key need is to safely hold
the vessel to protect the ship, life, the public interest, and to preserve the capabilities of
the vessel and surrounding facilities. Ship moorings are provided for:
a) Loading/Unloading - Loading and unloading items such as stores,
b) Ship Storage - Storing the ship in a mooring reduces fuel consumption
and personnel costs. Ships in an inactive or reserve status are stored at moorings.
c) Maintenance/Repairs - Making a variety of repairs or conducting
maintenance on the ship is often performed with a ship moored.
d) Mission - Moorings are used to support special mission requirements,
such as surveillance, tracking, training, etc.
Most DOD moorings are provided in harbors to reduce exposure to waves,
reduce ship motions, and reduce dynamic mooring loads. Mooring in harbors also
allows improved access to various services and other forms of transportation.
TYPES OF MOORING SYSTEMS. Examples of typical moorings systems
are given in this chapter.
Fixed Mooring Systems. Examples of typical fixed moorings are given in
Table 2-1 and illustrated in Figures 2-1 through 2-5.
Fleet Mooring Systems. Examples of typical fleet moorings are given in
Table 2-2 and illustrated in Figures 2-6 through 2-13.