USMC Infantry Rifleman (MOS 0311) Practice Test 2026 - Free Infantry Exam Practice Questions and Study Guide

Marking the landing zone during daylight relies on clearly visible ground cues that aircraft can read from the air. A flight panel is a large, high-contrast orange panel placed on the ground to outline the LZ so helicopter pilots can spot it from altitude in daylight. If a flight panel isn’t available, colored smoke can serve as a day-marking method because the dense, bright plume provides a prominent visual cue for pilots searching the area. Flares are primarily used at night due to their bright light and short visibility window, and signals by themselves don’t provide the standardized, quick-read markings needed for a landing zone during the day. So the day-method options are flight panels or smoke, making that choice the correct one.