pilot balloon वाक्य

उदाहरण वाक्य

1. In addition to surface weather observations, the weather ships would launch radiosondes and pilot balloons, or PIBALs, to determine weather conditions aloft . Due to its value, operations continued after World War II ended, which led to an international agreement in September 1946 that no fewer than 13 ocean weather stations would be maintained by the Coast Guard, with five others maintained by Great Britain and two by Brazil.