Three experiments were conducted to determine the ballistic effectiveness of water against a shaped charge jet. Water depths of 500, 1000 and 1500 mm were evaluated. The data suggest that water cannot be assigned one value to describe its ballistic efficiency against a shaped charge jet. Calculations show that 500 mm of water had an elemental mass efficiency (em) = 3.9, 1000 mm of water had an em = 2.6, and 1500 mm of water had an em = 1.8.
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