The Third JCOMM Marine Instruments Workshop will be organized and conducted by the WMO-IOC Regional Marine Instrument Center for the Asia-Pacific Region, which was established on the basis of the National Center of Ocean Standards and Metrology (NCOSM) of SOA, China. Potential participants to the Workshop include scientists, experts, researchers, engineers and government managers involved in the fields of oceanography and marine meteorology from Member countries of WMO and IOC of the Asia-Pacific region, as well as members of RIMCs. 2.2 Objectives. The Workshop is especially designed for training on the theory, standards, methods, procedure, practice and data processing of the calibration of marine instruments (wave buoy in particular), aiming at improving participants’ capacity of applying wave buoy instruments, therefore contributing to improving the data quality of ocean observation on regional basis. Also, the Workshop will serve as a platform for discussions on methods, procedures and techniques of the Global Salinity Inter-Comparisons, which will be organized in September 2013. The Workshop will be conducted through class sessions, hands-on exercises and discussions: 1 Best practices in operating and handing calibration of wave buoys; 2 Training on calibration and troubleshooting techniques; 3 Hands on operation and calibration of wave buoys; 4 Information sharing and networking among the countries within and outside the region; 5 Training on data quality control of marine observation; 6 Training and discussion on the methods and procedures of international salinity inter-comparisons. All information related to the Workshop will be made available on the JCOMM website under: www.jcomm.info/rmic3-ra2