3. Lakes. Lakes at least one-half mile (1 kilometer) square give good light reflection. 4. Forest and woodlands. Forested areas at least one-half mile square with clearly defined boundaries of unmistakable shape. 5. Major roads and highways. Straight stretches of main roads with one or more intersections. For night recognition, dark surfaced roads are not desirable as IPs although when the roads are wet, reflection from moonlight is visible.