MIL-D-81609C, MILITARY SPECIFICATION: DETECTING SET, MAGNETIC, AN/ASQ-81 (V) (23-JUL-1981)

MIL-D-81609C, MILITARY SPECIFICATION: DETECTING SET, MAGNETIC, AN/ASQ-81 (V) (23-JUL-1981)., The equipment covered by this specification shall be installed in fixed wing aircraft or towed by rotary wing aircraft for use in the detection of anomalies in the magnetic field of the earth due to the presence of submarines.