2. Although these procedures are approximate, additional research in the 

 area of partially embedded object breakout is not justified at present. The 

 accuracies achievable appear adequate for the sorts of operations toward 

 which these procedures will be applied. These accuracies are considerably 

 greater than those achievable for deeply embedded object breakout and 

 aided breakout. 



3. Future research should be directed toward developing techniques, similar 

 to those of this report, for predicting the effort required for deeply embedded 

 object breakout and aided breakout. 



4. Extensive small-scale model laboratory studies, supplemented by limited 

 field tests, appear to offer the most economical course for this research. 



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