US Navy Nuclear Submarine Crashes Through Polar Ice

U.S. Navy nuclear submarines USS Hartford (SSN 768) and USS Connecticut (SSN 22) surfacing in the Arctic Ocean for Ice Exercise (ICEX).

During ICEX, Navy submarines would conduct Arctic transits in which they would surface and break the ice (usually 60-90 cm or 2–3 feet thick), collect data, and run other training exercise to gain experience working in the Arctic.