Influence of Torpedo Speed on Submarine′s Torpedo Warning Distance

To study the operational application of double-speed anti-submarine torpedo under the effect of submarine′s torpedo warning sonar, the influences of the variations of torpedo speed and deep on its radiation noise intensity are analyzed by using the empirical formula of radiation noise. According to the analysis of passive sonar equation, the variation rule of the warning distance of torpedo sonar is investigated for varying torpedo speed. Calculation result shows that torpedo warning distance increases with torpedo speed. It is suggested that attention be paid to presenting torpedo speed in the operational application of double-speed torpedo to reduce the torpedo warning distance by low speed running, and to enhance stealth of the torpedo and success probability of the attack.