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Posted 6/25/2009 Printable Fact Sheet
Douglas B-18B
Douglas B-18B (S/N 37-530, originally a B-18A) with the MAD tail boom. (U.S. Air Force photo)
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Some Douglas B-18 and B-18As were modified late in their service lives for antisubmarine warfare (ASW). The B-18 was used because it was available and a patrol aircraft was needed immediately to counter the German U-boat threat off the coast of the United States and in the Caribbean early in World War II.

The bombardier's compartment was replaced by a search radar with a large radome. Some aircraft were fitted Magnetic Anomaly Detection (MAD) units housed in tail booms (as shown in the photograph). 

The museum has a B-18 on display in the Air Power Gallery.

Type Number built/
B-18B 122 B-18 and B-18A modified for ASW

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