Introduction. Legal documents: PSSA Guidelines; Guidance Document for Submission of PSSA Proposals to IMO; PSSA Proposal Review Form; Uniform PSSA Resolution Format. PSSAs designated by the Committee since 1990. Annexes: PSSA Guidelines; Guidance document for submission of PSSA proposals to IMO; PSSA proposal review form; Uniform PSSA resolution format; PSSAs designated since 1990; Great Barrier Reef PSSA and the Torres Strait PSSA as an extension of the Great Barrier Reef PSSA; Archipelago of Sabana-Camagüey; Sea Area around Malpelo Island PSSA; Sea Area around the Florida Keys PSSA; Wadden Sea PSSA; Paracas National Reserve PSSA; Western European Waters PSSA; Canary Island PSSA; Galapagos Archipelago PSSA; Baltic Sea Area PSSA. A Particularly Sensitive Area (PSSA) is an area of the marine environment that needs special protection through action by the International Maritime Organization (IMO) because of its significance for recognized ecological, socio-economic, or scientific attributes where such attributes may be vulnerable to damage by international shipping activities. At the time the designation of a PSSA, an associated protective measure (APM), which meets the requirements of the appropiate legal instrument establishing such measure, must have been approved or adopted by IMO to prevent, reduce, or eliminate the threat or identified vulnerability. IMO is the only intetnational body responsible for assessing proposals for and designating areas as PSSAs and adopting measures applicable to international shipping. This publication provides the reader with an overview of all PSSAs designated by the MEPC since 1990 and includes all key 'legal documents' as follows: Revised PSSA Guidelines; Revised Guidelines to submit PSSA Proposal to IMO; PSSA Proposal Review Forms; and Uniform PSSA Resolution Format. These texts were designed by the Marine Environment Protection Committee (MEPC) to assist Member Governements in the preparation, identification and submission of PSSAs and to provide the MEPC with the information for a robust review method of a PSSA proposal to ensure that the revisef PSSA Guidelines are fulfilled. It is also hoped that this publication will also asssit mariners world-wide to approach and navigate near or through these PSSAs with caution and act as recommended by the APMs.