UFC 4-159-03
3 October 2005
Static Longitudinal Current Force for Blunt Vessels. The methods in
4-5.3
Chapter 4-5.2 are inappropriate for very blunt-bow vessels, such as floating drydocks.
For blunt-bow vessels use the methods and equations in Chapter 4-5.1 Static
Transverse Current Force for the longitudinal current force on the hull. In this case use
the appropriate parameters as input.
For example, take the case of a floating drydock 180 feet wide with a draft
of 67 feet moored in a water depth of 70 feet. A current of 1.2 knots is predicted (using
methods in Chapter 4-5.1) to produce a longitudinal current force of 144.9 kips on this
floating drydock. Full-scale measurements were made on the actual drydock for this
case and the measured longitudinal force was 143 kips. In this example the predicted
force is approximately 1% higher than measured.
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