1.2.1 GENERAL. Fleet moorings are pre-existing facilities used to provide temporary
berthing for fleet units in ports and harbors where pier space is limited or
unavailable. The most common types of fleet moorings consist of one or more buoy
systems made up of surface buoys, riser and anchor chain subassemblies, fittings,
and anchors. A vessel will moor with its lines or anchor chain connected to shackles,
ground rings, or other mooring components on top of the buoy.
1.2.2 TYPES OF FLEET MOORINGS. Several basic types of fleet moorings are
Most of these are riser or non-riser buoy systems (refer to
Paragraph 1.2.6); some do not require a buoy. Special fleet moorings and floating
drydock moorings are also discussed briefly, but are not addressed in the later
chapters of this manual.
Free Swinging. This mooring consists of a single buoy to which a ship is
attached by means of bow lines or anchor chain. The ship is free to swing
360 degrees around the buoy as it responds to environmental loading
conditions (weather vane). This type of mooring may use either a riser or
non-riser buoy system (see Figure l-l).
Bow and Stern Mooring. This mooring is designed mainly for use by a
single ship secured by its bow and stern lines to two buoy systems (see
Figure 1-2). This mooring is normally installed near a shoreline, parallel
to the direction of the water current, and outside the normal
Riser buoy systems (see Paragraph 220.127.116.11) are
normally used in this type of mooring.