I'm in the Nathaniel B. Palmer's biology lab looking at forams. The little shiny cups on the counter are sieves with very fine screening, to wash the forams out of the mud. The seal people and two Crabeater seals. The seals have lost interest in science, and are headed for an open water lead. A SeaBeam image of part of the bottom of the Amundsen Sea, showing iceberg scours.
Scours are gouges or trenches plowed up by iceberg bases dragging on the bottom.
The ships path is down the center of the swath. It starts in the upper left, and in the middle it makes a left hand turn and heads towards the upper right. There are several iceberg scours in this picture. The biggest one is the horizontal feature that goes across the middle, and then bends upward as it gets near the right hand edge. The bend happened when the berg changed direction.