Synthetic aperture sonar imagery of anti-submarine net, with chain links clearly visible on the seafloor. During World War II, a net of 2,700 yards, supported by over 800 yards of moorings, stretched across the entrance to Massacre Bay, extending west from Alexai Point.
SAS imagery of anti-submarine net
Image courtesy of Exploring Attu’s Underwater Battlefield and Offshore Environment/ThayerMahan, Inc.
Download largest version (jpg, 4.50 MB).

Synthetic aperture sonar imagery of anti-submarine net, with chain links clearly visible on the seafloor. During World War II, a net of 2,700 yards, supported by over 800 yards of moorings, stretched across the entrance to Massacre Bay, extending west from Alexai Point.