4. (Refer to Figure 59, area 2.) The chart shows a gray line with "VR1667, VR1617, VR1638, and VR1668." Could this area present a hazard to the operations of a small unmanned aircraft?

VFR military training routes at and below 1,500 feet AGL (with no segment above 1,500) will be identified by four digit numbers, e.g., VR1351. VR above and below 1,500 feet AGL (segments of these routes may be below 1,500) will be identified by three digit numbers, e.g., VR426. Small UAS must operate below 400 feet. This 4-digit Military Training Route indicates operations below 1,500 feet AGL, which could present a hazard to the sUAS operation.
VFR military training routes at and below 1,500 feet AGL (with no segment above 1,500) will be identified by four digit numbers, e.g., VR1351. VR above and below 1,500 feet AGL (segments of these routes may be below 1,500) will be identified by three digit numbers, e.g., VR426. Small UAS must operate below 400 feet. This 4-digit Military Training Route indicates operations below 1,500 feet AGL, which could present a hazard to the sUAS operation.