TABIE 3 Feasibility of Experiments as a function of Mode of Operation Airplane Most difficult, conceivably possible. If collimation needed, un- Ship at Sea Land (includes ship beached) Not quite so impossible as w/plane, but still difficult. If 2 ships Best chance used, cable connection close to impossible. Again, doubtedly out. collimation questions. Internal threshold detectors Probably favored, since no ground contamination Not much different than in case of land «- have ship materials to consider problem, Comparable with ship operation. Not s0 good as air. (e.g, Fe). Neutron Measurements: Probably out Clearly out -- no chance for recovering Best chance Phonex Qut because of collimators Out because of collimators Best chance Photography a. Ball of Fire Probably favored by air Not so dependable as for air. Better if tower shot. External TD's Possible. No so good as air. L be High-resolution Probably out Probably out because of ocean swell Best chance ce. Bhangmeter Probably favored by air Not quite so dependable as Not as dependable as air. High-resolution Spectroscopy Possible Probably possible 8till possible, perhapa not so nice as with air. Effects Possibly benefited by plane Questionable ~-- perhaps could measure blast and thermal radiation from 1 or 2 points Okay Unknown Probably possible if desired. for air fm point of view that burst ht could be made tactical + rad contam could be studied Others Probably impossible if instrumentation at all complicated iene

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