This report identifies and discusses the significant safety aspects associated with the arrival, berthing and unberthing operations of oil and gas tankers at terminals. Factors considered included the terminal’s safety management and risk assessment procedures and the impact of wind, wave and current forces acting on the tanker. rnrnOil and gas terminals pose safety hazards and environmental risks which can be controlled and minimised through proper design and the application of sound operating practices. Industry guidance, together with national codes of practice, such as the UK’s Port Marine Safety Code, promotes a unified approach to managing safety within ports and terminals. The guidance contained within this document aims to build on such existing recommendations and requirements and focuses on the critical issues associated with a tanker’s harbour approach and berthing/unberthing operations. rnrnIt is recommended that governments have a clear understanding of the safety aspects and risks affecting the berthing operations of tankers to oil and gas terminals. The present guidance is aimed at promoting a common and mutual understanding of these safety aspects and risks as a basis for making recommendations to national authorities.