Complex sentence: The Royal Netherlands Navy lost three Atlantics out of nine aircraft in a series of failures over the Atlantic Ocean, resulting in the grounding of the type in 1981 and its eventual replacement by the P-3 Orion.
Split into simpler sentences: The Royal Netherlands Navy lost three Atlantics out of its nine aircraft through a series of failures during missions over the Atlantic Ocean. These losses resulted in the grounding of the type in 1981 and contributed to its eventual replacement by the P-3 Orion.