How do you describe a skier down flag?

A skier down flag is a safety device used in skiing to signal that a skier has fallen or is in distress on the slopes. Typically, it consists of a bright orange or red flag attached to a pole, which is placed in a visible location near the skier's location. This alerts other skiers and ski patrol to the situation, allowing for timely assistance. The flag is an essential tool for ensuring safety on the slopes, especially in areas where visibility may be limited.