Polarcus Seismic Limited (Polarcus) proposes to undertake a three-dimensional marine seismic survey (Capreolus 3D MSS) in Commonwealth waters of the Offshore Roebuck Basin, Western Australia, commencing in January 2015 for a period of up to six months.  The survey will be undertaken in an area of the North West Shelf located approximately 120 km north of Port Hedland and approximately 320 km west of Broome.
The survey area, which covers approximately 25,000 square kilometres (km2), comprises the area within which Polarcus currently anticipate the 3D seismic acquisition will be undertaken. At its closest, the survey area is approximately 135 km north of Port Hedland and approximately 340 km west of Broome. The  wider  operational area of approximately 38,000 km2   incorporates  the necessary  space  for  vessel  manoeuvring, line run-outs and turns, source testing and soft starts. At its closest, the operational area is approximately 120 km north of Port Hedland and approximately 320 km west of Broome.
The total volume of the planned airgun seismic energy source for the survey is 3,480 in3 with an operating pressure of approximately 2000 psi. The resulting sound exposure level from the airguns, is approximately 238.2 dB re 1μPa2.s at a frequency of 0-500 hertz.
 
Note: This information has been extracted from the EP Summary. Please refer to the attached EP Summary for more information.