This report documents the DESMOOR computer program which selects trial designs of mooring systems for surface ships in deep water. Either slack (negatively buoyant catenary) or taut (neutrally buoyant) moors can be treated. Given design coefficients for the mooring line material, the number and headings of the mooring lines, and specifications of design constraints, the program selects the minimum require leg diameter. In the case of slack moors the anchor locations are also determined. A search is then made of defined component inventories to select buoys, anchors, chains, and hawsers as required by the design configuration. The program utilized the equations of static equilibrium at a reference point on the ship and the ship is presumed to be a rigid body with zero heave, pitch and roll. The external loadings on the ship are obtained from user-supplied wind and current load tables or approximate analytical functions. Similarity scaling is used when the load tables from one ship (or model) are used to approximate the loads or another. The DESMOOR program was developed as a preliminary design tool to be used in conjunction with the deep sea ship mooring static and dynamic analysis features of the SEASYN computer program.


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