strange markings in the barent sea

anybody got an idea what these markings are on the sea floor in the barent sea . they dont look like anysort of geology i ever seen. big rectangles and triangles
maps.google.co.uk...,41.690686&z=7&t=h&hl=en-GB
i thoght they may have been oil lines but they seem too big. i did a search and didn t come up with any previous posts

sorry cant get link to work or import pic try position
73 57 08 32N 41 41 26 47 E altitude 760km



[edit on 28-3-2009 by da pickles]

the map doesnt show underwater detail. just a flat blue. ?
2nd line