Soukyuu no Fafner: Dead Aggressor

Synopsis

Kazuki rescues the search plane, which was being chased by the Festum, despite the specific instruction not to do so. As the island begins to move, the search plane watches as the two battle the Festum. The island releases its camouflage to prevent any further damage to occur. The female core saves the Fafner from falling into the ocean, while trapping the Festum at the same time, allowing Kazuki to shoot down the alien. However, due to the island being seen, the search plane gives a report back to its headquarters.

(Source: Wikipedia)