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VOLUME I Multinational Maritime Tactical Instructions and Procedures

VOLUME I Multinational Maritime Tactical Instructions and Procedures

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MTP 1(D), Vol. I<br />

b. Predicted Sonar Range (PSR). PSRs are determined by each unit for its sensors under the<br />

existing environmental conditions. When mixed-layer <strong>and</strong> thermocline conditions exist, PSRs are calculated<br />

for various sensor <strong>and</strong> target depth combinations in-layer <strong>and</strong> below layer. PSRs can be determined<br />

for active or passive sensors, <strong>and</strong> depend on the sensor’s characteristics, operator’s ability, environmental<br />

conditions, target source levels for passive operations, <strong>and</strong> depth locations of sensor <strong>and</strong> target. PSRs<br />

should normally be determined on a 50 percent probability of detection, if not otherwise stated. When convenient,<br />

units fitted with variable depth sonars may specify the minimum <strong>and</strong> maximum figures of PSR for<br />

targets below layer depth <strong>and</strong> report the shallowest target depths at which these figures are predicted.<br />

9-2a (Reverse Blank) CHANGE 1

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