Complex sentence: This was in spite of there being a Luftwaffe Freya radar that detected the raid while still one hour out; this unit was unable to communicate with the fighters, and the only radar reports to reach them came from a naval Freya near the target.
Split into simpler sentences: This was in spite of there being a Luftwaffe Freya radar that detected the raid while still one hour out; this unit was unable to communicate with the fighters. The only radar reports to reach them came from a naval Freya near the target.