An aerial survey gathers data on endangered blue, fin and humpback whales that in recent years have been gathering to feed off the Channel Islands in an area that overlaps a major shipping lane.Reporting from the Channel Islands -- Natalie Senyk and Ben Waltenberger peered out the bubble-shaped windows of the small research plane flying 1,000 feet over the Channel Islands National Marine Sanctuary and scanned the ocean surface for signs of life.