- The use of nonmetallic ropes for offshore applications is examined. Beginning with the discussion of practical design considerations, the characteristics of nonmetallic ropes are compared with conventional wire rope and chain mooring legs. A general dimensionless formulation of the static mooring-leg problem valid for arbitrary ocean-floor slope and single- or multiple-component mooring lines is presented. In addition, a new constitutive equation is developed for extensible mooring lines. Numerical results are presented in the form of design curves. These design curves characterize the behavior of both single- and multiple-component mooring lines in terms of pertinent dimensionless groups.