This paper relates the need for international cooperative actions to s
upport the development of the ocean science and observation capabiliti
es to the United Nations Convention on the Law of the Sea, which enter
ed into force in November 1994, and the results of the United Nations
Conference on Environment and Development, Rio de Janeiro, 1992. Parti
cularly, the framework for the presentation is the mechanism provided
by the Intergovernmental Oceanographic Commission (IOC) of UNESCO. The
goals of these activities should be the strengthening of national cap
acities to deal with the requirements of UNCLOS and UNCED implementati
on actions, within the context of national needs and priorities. A clo
se linkage and harmonisation between national and international struct
ures is desirable for mutual benefit. The related mechanisms of the IO
C are discussed. The partnership modality is emphasised. The challenge
for marine science to adapt to the changing conditions and requiremen
ts is analysed. In this context, the importance of indigenous capabili
ties is stressed, as well as the need to give a special attention to p
articular areas, e.g. small island developing countries. Some current
trends are briefly considered, in particular, the development of opera
tional oceanography, This also implies that there is a need for a new
professional community of operational oceanographers, The particularly
relevant results of UNCED are brought out, and also in relation to EE
Zs, a major part of UNCLOS, The need for interdisciplinarity and coope
ration between disciplines and society sectors is discussed and exempl
ified, Finally, an approach for the future is suggested, involving the
IOC as a joint specialised intergovernmental mechanism. (C) 1998 Else
vier Science Ltd. All rights reserved.