A New York University doctorate student monitors the laser in ERDC Cold Regions Research and Engineering Laboratory’s flume recently, looking at the sea ice and ocean interface. The “V” is attached to the underside of the bow, as indicated by (A) in the photo. The “V” deflects the air bubbles, allowing the laser to track the glass spheres’ circulation in the water current. The flow direction is indicated by the arrows at (B) and also shows the rippling effect of the scalloped ice.