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Analysis and Ranking of the Acoustic Disturbance Potential of ...

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Report No. 6945<br />

BBN Systems <strong>and</strong> Technology Corporation'<br />

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FIG. E.21 TUG/BARGE OPERA~NG IN NORTH ALEUTIAN BASIN<br />

Surface Layer Conditions<br />

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1/3 Octave B<strong>and</strong> Center Frequency, Hz<br />

FIG. ~ . 2 2 TWIN OUTDRIVE OPERATING IN NORTH ALEUTIAN BASIN (2-80hp)<br />

Surface Layer Conditions<br />

113 Octave B<strong>and</strong> Center Frequency, Hz<br />

E- 13<br />

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