Officers can the horizon through periscopes aboard the attack submarine USS Santa Fe (SSN 763).

29 января 2010 г. Американская подводная лодка USS Santa Fe (SSN 763) на патрулировании в Тихом океане.

100129-N-3560G-003 PACIFIC OCEAN (Jan. 29, 2010) Lt. j.g. John Sines, left, damage control assistant, and Lt. Andres Aviles, navigation operation officer, scan the horizon through periscopes aboard the attack submarine USS Santa Fe (SSN 763) searching for contacts during a transit of the Pacific Ocean.

(U.S. Navy photo by Mass Communication Specialist 2nd Class Ronald Gutridge)