Which unmanned system is in development to replace AP-3C Orion for maritime ISR?

• A. P-8A Poseidon
• B. MQ-4C Triton
• C. EA-18G Growler
• D. F-35 Lightning II

Answer: (B)

The important idea is long-endurance, over-ocean surveillance using an unmanned platform. The MQ-4C Triton is built as a large, high‑altitude unmanned aircraft designed for persistent maritime ISR, able to patrol vast sea areas for extended periods and feed data back to command centers and other assets in real time. This matches the role of the AP-3C Orion—providing broad maritime surveillance, tracking surface contacts, and collecting intelligence—without risking aircrew. The other options are a manned patrol aircraft, an electronic warfare jet, and a multirole fighter, none of which fulfill the unmanned, long-endurance maritime ISR mission. So the unmanned system in development to replace the AP-3C Orion for maritime ISR is the MQ-4C Triton.