Wigan, who led through a superb strike from Charles N'Zogbia, pulled one back at the end through Jordi Gomez but the defeat left Robert Martinez's frustratingly inconsistent side in 14th place -- four points above the drop zone.
The Navy is developing N-UCAS as a stealthy, carrier-based unmanned aircraft that would allow Carrier Strike Groups to operate effectively from outside the envelope of enemy missile threats and could act as a prime hunter against missiles and their launchers before and after launch.