Resolution No.21 (1963): Extension of the WMS over oceanic areas

The IUGG notes with satisfaction the work done by a number of countries conducting aeromagnetic measurements that contribute to the World Magnetic Survey, and recommends that efforts be made to extend greatly the coverage thus far obtained, over oceanic areas adjacent to the various countries as well as over the central portion of the oceanic basins, using, for example, longer range aircraft than currently employed.