Marine Debris to Energy Projects - Side Scan Sonar
The Marine Debris to Energy Project is a project that aims to study the waste coastal marine area off New Hampshire. An important part of this project is to detect submerged derelict fishing gear for future removal.
In early August, 2011, we worked with the Rozalia Project to survey 28.64 miles of waters off the coast of New Hampshire, with the objective of identifying potential derelict lobster traps.
1,570 potential derelict trap were identified
296 waypoint locations of potential derelict traps were recorded on sonar
A higher volume of potential derelict lobster traps exists within 1.0 mile of the coast. Density of inshore tracks = 72.8 potential derelict lobster traps/mile.
Derelict lobster traps are not static. During the survey, American Promise re-surveyed a shipwreck that was part of a 2008 sonar survey. During the 2008 survey, the top of the wreck was covered by over 20 derelict traps. During the 2011 survey, the sonar image shows a wreck with no derelict lobster traps on it, just an active trap line to its port side.
The popularity of the Portsmouth Harbor area for fishing and its use by many commercial and recreational vessels led us to concentrate our first survey in this area.