GK Consulting
Undersea Search & Survey
Specializing in Shipwreck and Aircraft Location
E-mail:  2kozak@comcast.net
Telephone:  603.434-0732  
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SS Portland, sank 1898
Sonar Images made from a Bluefin AUV with a EdgeTech 2200m Sidescan Sonar Payload

See:http://stellwagen.noaa.gov/maritime/portland.html