d. Approach/Takeoff. 1. There should be at least one path of approach to the LZ measuring 75 meters in width. 2. A rotary wing aircraft is considered to have a climb ratio of 1:5 (Figure 20). 3. Takeoff and departure from the LZ may be along the same path used for the approach; however, a separate departure path as free from obstacles as the approach path is desired (Figure 20).