At what altitude does the MK-79 red star display operate?

• A. 250-650 feet
• B. 500-1000 feet
• C. 100-300 feet
• D. 1000-1500 feet

Answer: (A)

The MK-79 red star display is designed as a low-altitude signaling flare for maritime use. It should be visible to nearby vessels from a modest height above the water, giving enough contrast against the dark sea and sky while staying within a safe, practical viewing distance. The 250 to 650 feet range hits that balance: high enough to be seen clearly over the water and horizon, but not so high that brightness and recognition are diminished or the signal becomes hard to interpret. If you go higher, brightness and visibility can degrade over distance; if you drop too low, the flare can be obscured by the deck, spray, or waves, or be harder to spot against the water. Hence, 250–650 feet is the appropriate operating altitude.