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