Seismic reflection profiles were acquired using the University of Southampton’s Boomer sub-bottom profiler. Consisting of an Applied Acoustics AA200 plate mounted on a small, lightweight catamaran, the system is powered by an Applied Acoustics CSP300 Capacitor Discharge box capable of duty cycles up to 2 PPS at a maximum power output of 300J. THe Boomer provides a highly repeatable, broad bandwidth, impulsive seismic source with frequencies ranging between 0.4 KHz and 4.0 kHz, peaking at c.1.5 kHz.
During surveying the catamaran is towed c.15m astern of the MV Koklimoni, immediately behind the launch boat. Use of the launch boat made for easier deployment and retrieval (lower sided than the MV Koklimoni), and acted to shield the catamaran from propeller wash during surveying. Data was recorded using an 11-element mini-streamer (c.3m long active section) towed off a 0.5m long boom on the post stern quarter. Lateral offset between source and receiver was c.5m, while the inline offset was varied during the early part of the June 2013 survey to optimise imaging (settling on c.20m behind the vessel). Raw analogue data was digitized using a CODA Octopus DA2000, and stored to disk as unprocessed SEG-Y files with navigation from the catamaran mounted GPS antenna.