The readiness of weapons was at first determined manually. Early fire control consisted of range measurements and calculation of the submarines course and speed. The aiming point was then manually determined by rule. Later, mechanical computers were used to solve the fire control problem with electrical indication of weapon readiness. Today the weapon firing process is carried out by digital computer with elaborate displays of all relevant parameters.

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ASW Countermeasures

The main countermeasure the submarine has is stealth, that is it tries not to be detected. Against the ASW weapon its self, both active and passive countermeasures are used. The former may be a noise making jammer or a decoy providing a signal that looks like a submarine. Passive countermeasures may consist of coatings to minimise a torpedo's sonar reflections and/or an outer hull to provide a stand-off from its explosion. The Anti-submarine weapon has to overcome these countermeasures.

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See also

• Anti-submarine warfare
• Depth Charge
• Magnetic anomaly detector

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References

• Blair, Clay, Silent Victory (Vol.1), The Naval Institute Press, 2001
• Lanning, Michael Lee (Lt. Col.), Senseless Secrets: The Failures of U.S. Military Intelligence from George Washington to the Present, Carol Publishing Group, 1995
• Preston, Anthony, The World's Greatest Submarines", Greenwich Editions, 2005.

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External links

• Anti-Submarine Indicator Loops
• Early British torpedoes
• US Naval Weapons

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