Preliminary Mooring Plan for the Empress 11 Barge,
NAVAL FACILITIES ENGINEERING COMMAND WASHINGTON DC CHESAPEAKE DIV
Pagination or Media Count:
The best method of mooring the Empress II and test vessel is by using a four-point mooring illustrated in the attached figure. Each point of the mooring will be a riser-type mooring with a buoy that can be used to moor the vessels because of their ease in handling. The mooring lines should 1 stretch to act as shock absorbers 2 have strength 3 float or have floats attached 4 resist abrasion 5 resist chemicals and 6 resist ultraviolet light. The type and dimensions of the lines will be determined in the final design stage. The sheltered waters in the Chesapeake Bay are recommended for testing small to medium class ships. The Bay area has the advantages that waves are fetch- and depth-limited and that land areas will tend to reduce local wind speeds slightly. The major disadvantages of the Bay area are the limited water depth and manuevering room which poses a hazard to large vessels. Test sites in coastal ocean waters have the advantages of greater water depth and manuevering room for the test ship. However, waves at the ocean sites will be generally larger than in the Bay. Testing in the summer will minimize wave effects. An ocean mooring should be in at least 70 feet of water to reduce non-linear wave forces in the mooring.
- Marine Engineering