IAPSO is sponsoring/co-sponsoring Working Groups, Commissions and Services relevant to its prime goal of "promoting the study of scientific problems relating to the oceans and the interactions taking places at the sea floor, coastal, and atmospheric boundaries insofar as such research is conducted by the use of mathematics, physics, and chemistry."
Here they are with links to their pages with more description.
Joint Committee on the Properties of Seawater (JCS)
Commission on Mean Sea Level and Tides (CMSLT)
Tsunami Commission (Joint with IASPEI and IAVCEI)
Joint Commission on Ice-Ocean Interactions (JCIOI, joint with IACS)
Permanent Service for Mean Sea Level
IAPSO Standard Seawater Service
To promote the study of the oceans and the interactions that take place at its boundaries with the sea floor, coastal environment and atmosphere, through the use of physics, chemistry, mathematics and biogeochemisty.
IAPSO gives importance to involving scientists and students from developing countries in oceanographic activities.