Keywords: AN - AQS-20A Sonar and Electro-optic mine Identification -b.jpg AN_-_AQS-20A_Sonar_and_Electro-optic mine_Identification http //www dtic mil/cgi-bin/GetTRDoc Location U2 doc GetTRDoc pdf AD ADA457204 1987 author PD-USGov-Military-Navy Naval mine countermeasures |