Complex sentence: The second Hudson also failed to report its sighting by radio but completed its patrol, landing at Milne Bay at 15:00, and then reported sighting "two heavy cruisers, two light cruisers, and one unknown type".
Split into simpler sentences: The second Hudson also failed to report its sighting by radio, but completed its patrol and landed at Milne Bay at 15:00. It reported sighting "two heavy cruisers, two light cruisers, and one unknown type".