This map depicts the corridor for nighttime flight navigation between San Diego, California, and Bakersfield, California, and includes major urban... Show moreThis map depicts the corridor for nighttime flight navigation between San Diego, California, and Bakersfield, California, and includes major urban areas, roads, railroads, etc., and the location of airfields, sea-plane landings, and navigation beacons. It is in black and white, rather than full color. There is no date appended. Show less