Buoys Help Avert Whale-Ship Collisions : Image

Ten auto-detection whale buoy systems line the Boston shipping lanes, each five miles apart so that the listening radius of each hydrophone overlaps. Data are relayed to a command-and-control center at Cornell, where analysts validate the presence of right whales and alert ships to slow down and watch for whales. Three other mooring systems monitor whales in Cape Cod Bay. (Map by Jim Canavan, Woods Hole Oceanographic Institution)