Hello
BadKarma1001 "How deep do i have to go for not be spotted by planes"
lurker_hlb3 "PBY5A are equipped with "MAD" "
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The function, then, of airborne MAD equipment is to detect the submarine-caused anomaly in the earth's magnetic field. Slant detection ranges are on the order of 500 meters from the sensor. The depth at which a submarine can be detected is a function both of the size of the submarine and how close the sensor is flown to the surface of the water.
http://www.fas.org/man/dod-101/navy/docs/fun/part09.htm
This 500 m detection range is for after war MAD gear.
lurker what range are you using in OM?
P.S The Japanese Navy first employed an Airborne Magnetic Detecting instrument in antisubmarine warfare during the middle of 1944. The instrument had an effective range of 150 meters under average conditions and 250 meters under ideal conditions
Q. What was the best height for your aircraft to fly when using the MAD?
A. Expert pilots flew at 10 meters; ordinary pilots flew at 50 meters.
Q. What was the range of detection from these heights?
A. Under average conditions trained personnel could detect submarines at the depth of 150 meters from a plane flying from 10 to 50 meters above the surface. The radius range of detection in other direction was approximately 150 meters. However, experienced pilots with equipment in excellent condition and good operating personnel could detect a submarine at a maximum depth of 250 meters.
http://ibiblio.org/hyperwar/AAF/USSBS/IJO/IJO-48.html