A US Navy (USN) S-3B Viking aircraft, Sea Control Squadron 35 (VS-35), Blue Wolves, Naval Air Station North Island (NASNI), California (CA), in flight, carrying a Air Combat Maneuvering Instrumentation (ACMI) pod with a GPS/Telemetry nosecone antenna system, approaches a US Air Force (USAF) KC-10 Extender, 6th Air Refueling Squadron (ARS), Travis Air Force Base (AFB), CA, during a refueling operation (OPS)