scope:

General

These Guidance Notes provide direction for the design and analysis of nearshore position mooring systems used for floating structures such as Floating Offshore Liquefied Gas Terminals (FLGTs), Floating Storage and Regasification Units (FSRUs), Floating Production Storage and Offloading Installations (FPSOs) and accommodation barges.

The nearshore mooring system in this document is intended to provide a long-term permanent stationkeeping solution, in that it is designed to keep the floating structure on position throughout its design life.

Position mooring systems should be designed in accordance with applicable rules or guides with a level of safety that matches the intended service. Special characteristics of the nearshore mooring systems are provided in 1/3.9. Where applicable, the ABS Guide for Position Mooring Systems and Mooring Equipment Guidelines, published by Oil Companies International Marine Forum (OCIMF) may be used for nearshore position mooring systems.

These Guidance Notes primarily focus on:

i) Jetty mooring or tension pile mooring

ii) Design environment considerations

iii) Operating conditions

iv) Environmental Loads and bearing capacity of the mooring systems

v) Emergency release of the mooring system vi) Mooring equipment qualification

vii) Maintenance, monitoring and inspection

The design of bottom fixed structures, such as a jetties, piers, quays, sea islands, wharfs, or dolphins, which serve as holding foundations for the mooring systems, is generally the responsibility of the Owner. Those structures should be designed in accordance with relevant industry guidelines and standards, and they should be able to provide the required holding capacity for the mooring systems.