Work related to the IIOE was conducted by several different groups devoted to different topics and activities, including the following
The IIOE had a substantial program of meteorology, supported by ships and aircraft. One of the activities in meteorology was the establishment of an International Meteorology Centre in Bombay. This was funded by the UN Special Fund. The draft proposal to the UN Special Fund and some draft correspondence related to the proposal can be foundhere. Prof. C.S. Ramage (Univ. of Hawaii) was appointed to coordinate the meteorological aspects of the project. Ramage convened a meeting of meteorologists in Bombay on 18-20 July 1961.
The biological program had several different elements. At the core was wide-scale sampling with the Indian Ocean Standard Net, developed for the expedition. This net was used to take vertical samples in a specified way, to provide a standard sampling protocol that could be compared basin-wide. Biological samples of all types were eventually sent to a Biology Center that was developed in Cochin, India. Another component of the biological investigations was a set of two land-based research camps, at Mandapam Camp, India and Nose Be, Madagascar. The United States funded a major biology program as part of IIOE.
A meeting was held in Cochin and Delhi on 14-17 August 1961 to discuss the sampling program for zooplankton and the proposal for a biological center (see agenda). Aproposal for the center resulted from the meeting.