How effective are the P8-A Sub hunter planes?


from the wiki:

QUOTE

During exercises in 2012 and 2013, and an overseas deployment to Japan, the P-8 reportedly exhibited radar, sensor integration, and data transfer problems, leading to additional testing. In January 2014, the Pentagon's Director of Operational Test and Evaluation office called the P-8A "ineffective" for large area ISR and anti-submarine warfare missions, and said that the initial aircraft were not ready for deployment.[63][64] The same report found that the P-8 was effective at the small-area search mission, and with much better range, speed, and reliability than older aircraft.[65] Pentagon acquisition undersecretary Frank Kendall disputed the report, saying that although its findings are factual, it did not acknowledge future capability upgrades for anti-submarine and wider-area surveillance