phone spacing 25 meters, inner offset 230.75 meters survey=marine area=Off.Crete source=Airgun spread=offend n1=2125 d1=.004 f1=.004 label1="Time (sec)" n2=96 d2=.025 f2=.23075 label2="Offset (km)" n3=1 title="Oz 30" plottpow=2.594360