. = Project 1.9 - Water Wave Studies - L. W. Kidd TESTRUMENTATION Studies of vater wave action generated by the detonation of lerge yield nuclear devices are made at relatively close ranges and at severe! distant island stations by Project 1.9. Four shore recording wave meceuring stations (of the Mark VIII type) were active in Bikini Lagoon for oR ahot, In addition, Prefect 1.9 constructed and inatalled four new type long period wave recorders on Enivetok, Ailinginse, Wake, and Johnston Islands, These reeorders are designed to document long period, lov amplitude deep ocean waves of the teunemi type. . The recorders operate oontinuously but only receive significant signals from the large shots. In addition to the above instrumentation, a tide pare was active at Ailinginse Atoll, and Sandis Corporetion ricroberogrephic stations were operated by Project 1.9 at Wake and Johnston. GRSULTS The lagoon anddeep vater long period recorders did not detect water wave action rE . ”2 = COPY S= BEST AVAILA - 18 -