Sonar Technician (Surface) 1st Class Mark Osborne supervises Sonar Technician (Surface) 2nd Class Randy Loewen, left, and Sonar Technician (Surface) 3rd Class Roland Stout, right, as they monitor contacts on an AN/SQQ-89V15 Surface Anti Submarine Combat System, aboard the guided missile destroyer USS Momsen (DDG 92). Ships and aircraft assigned to Carrier Strike Group (CSG) 9 are underway off the coast of Southern California participating in a Joint Task Force Exercise. (U.S. Navy photo by Mass Communication Specialist 2nd Class James R.