If you see an alternating red and green light from the light gun, which of the following should you avoid?

When you see an alternating red and green light from the light gun, it indicates that you should exercise extreme caution and be aware of your surroundings. This signal is typically used to alert pilots or vehicle operators that they should not proceed with their current actions.

Maneuvering with speed in response to this light would be inappropriate, as the signal emphasizes the need for caution and potentially requires you to stop or slow down instead. Speed could lead to a loss of control or make it challenging to respond appropriately to further signals or instructions from air traffic control.

In contrast, the other options, while potentially problematic, do not directly tie to the immediate interpretation of an alternating red and green light. Ignoring surface markings, making uncoordinated turns, and performing maintenance checks could all have their own risks, but they are not the direct reaction that the light signal advises against. Understanding the proper reaction to visual signals, such as the alternating light, is critical for maintaining safety in an operational environment.