Covers the first in depth tests to determine the actual new and used strengths and rate of strength reduction of large synthetic ropes, similar to those used as SBM/SPM Mooring Hawsers. This book provides a complete description of the first major large rope testing programme. This was undertaken to determine new and used strengths and the rate of strength reduction for large synthetic ropes, similar to those used as SPM Hawsers. All of the test data and analyses are included, together with conclusions and recommendations.