Side scan sonar record of debris on seafloor.

Planning chart showing location of side scan sonar targets and various AWOIS items for investigation.

Single beam sounding system depth record of obstruction.

Single beam sounding system depth record of obstruction identified as wreck in Buzzard's Bay area.

Portion of hydrographic survey smooth sheet showing rock with least depth.

Hydrographic survey sheet showing location of grounding of QE2 in Martha's Vineyard with track of ship.

Single beam sounding system depth record of obstruction with surveyor's annotations such as LTRA (Line turns right about), LR (Line resumes), 180 T ( course of surveying vessel), etc.

Side scan sonar record of obstruction on seafloor. White area is shadow zone. Amorphous nature of dark area would indicate probable natural object vs man-made debris.

Side scan sonar image of wreck on seafloor.

Side scan sonar image of what appears to be two aircraft on seafloor.

Just thought we'd fool you. Side of ship showing plimsoll lines as well as texture reminiscent of side scan sonar record.

Side scan sonar image of possible shipwreck above center line. Large linear black reflection with white area of shadow zone.

Side scan sonar image apparently of vessel.

Side scan sonar image apparently of vessel.

Side scan sonar image apparently of vessel.

Side scan sonar image of debris on seafloor.

Side scan sonar image of vessel.

Side scan sonar image apparently of vessel with large shadow area.

Side scan sonar image apparently of vessel.

Side scan sonar image of debris on seafloor.

Side scan sonar image of debris on seafloor.

Side scan sonar image apparently of vessel.

Side scan sonar image apparently of vessel.

Side scan sonar image of what might be a large boulder.

Side scan sonar image

Side scan sonar image

Single beam sounding system depth record of obstruction with surveyor's annotations such as LE (Line ends), LB (Line breaks), O/C 090 (on course 090), etc.

Single beam sounding system depth record of obstruction with surveyor's annotations such as LE (Line ends), XL (Cross-line), etc.

Side scan sonar image corrupted by strong thermocline in water column.

Side scan sonar image corrupted by strong thermocline in water column.

Side scan sonar image of small object on seafloor.

Side scan sonar image possibly of barge on seafloor.

Side scan sonar image demonstrating recorder problem.

Side scan sonar image showing debris on seafloor but having very little vertical expression. For charting purposes such a target can be insignificant. For archaeological work, such a target could be the sought for object.

Side scan sonar image showing debris on seafloor but having very little vertical expression. For charting purposes such a target can be insignificant. For archaeological work, such a target could be the sought for object.

Side scan sonar image

Side scan sonar image of vessel on seafloor.

Side scan sonar image of vessel on seafloor.

Side scan sonar image of possible natural feature with scour marks surrounding.

Side scan sonar image of a pile of coal dumped on the seafloor.

Side scan sonar image of some sort of man-made debris.

Side scan sonar image of biological noise in the water column caused by dolphins .

Side scan sonar image

Side scan sonar image

Side scan sonar image of vessel on seafloor.

Side scan sonar image

Side scan sonar image

Side scan sonar image of vessel on seafloor.

Side scan sonar image of vessel on seafloor.

Side scan sonar image