4.2.1 Cbhjective To obtain dimensional data on craters formed by nuclear detonations for use in developing a generalized "theoretical-empirical" means of predicting cratcr dimensions. Frocedure .dwo measuring techniques will be used for this project. These thoto Interpretation The army Map Service will employ stereoscopic photogrammetry to map theforaters. By this technique it is expected to obtain the erater diameters for Bravo, Union, “cho and Koon and some detail of the crater lips’ for Bravo, “cho, and Koon. b. “Fathometer Traverse - én LGU: equipped with a MK-6 fathometer will traverse the craters formed ati Bravo, Union, and Koon. The position of the LCU will be correlatedwith the fathometer soundings by use of "Ray dist." 4.2.3 Rem-rks a. follows: Fredicted era er-djameters and apparent crater depths are as Shot Depth Brevo 1¢0! Union xcho Koon 80! 70! 100! b. Incidental to its participation in this project the army Map Service will prepare maps of Eniwetok and Bikini Atolls. 4.3 FEroject Number: Sponsor: 3.3 AFSWP- U. S. Department of j Performing Agency: : Agriculture Froject Officer: :| [Blast Effects on Tree Mr. ‘iallace Fons i wi U. S. Depart- ment of Agriculture _,...(Forest Service) 4.3.1 Objective To determine the rate of attenuation of the shock w tyejin a forest stand. To determine blast damage to trees where effects are~4Afluenced by their location in a stand. 34