On the Heads-Up Display (HUD), which indicator corresponds to 50-75% cylinder remaining?

On the Heads-Up Display (HUD), which indicator corresponds to 50-75% cylinder remaining?

• A. 1 green
• B. 2 green
• C. Slow-flashing yellow
• D. Rapid flashing red

Answer: (A)

The heads-up display is designed to show remaining air at a glance using lights that change state as the cylinder level drops. When the cylinder is in the 50–75% range, only one green indicator is lit. This mid-range signal tells you you’re past the halfway mark but not yet in the lower-warning zone, so you still have a comfortable amount of air left. Two green indicators would imply a higher remaining air (above about 75%), while a slow-flashing yellow serves as a caution as air gets lower, and rapid flashing red signals critical, very low air that requires immediate action.

The heads-up display is designed to show remaining air at a glance using lights that change state as the cylinder level drops. When the cylinder is in the 50–75% range, only one green indicator is lit. This mid-range signal tells you you’re past the halfway mark but not yet in the lower-warning zone, so you still have a comfortable amount of air left.

Two green indicators would imply a higher remaining air (above about 75%), while a slow-flashing yellow serves as a caution as air gets lower, and rapid flashing red signals critical, very low air that requires immediate action.