Sustainment issues have caused the Navy's P-8A Poseidon fleet to slip below the required mission capability rate, according to a recent Defense Department inspector general report. From October 2018 to March 2020, the P-8A Poseidon fleet's mission capability rates were between 53% and 70%, well below the required 80% mission capability rate, the report, released Friday , states. The IG evaluated the ability of the Navy's P-8A Poseidon fleet to meet U.S. European Command's anti-submarine warfare requirements. The P-8A Poseidon...