What action should you take when the two range lights are aligned while heading into a channel?

When the two range lights are aligned while you are heading into a channel, it indicates that you are on the correct heading. Range lights are used as a navigational aid to help mariners determine their position relative to a channel or safe passage. When the lights align vertically or horizontally, it means that you are in line with the preferred navigational path.

In this situation, keeping your course is the most advisable action because deviation could result in straying from the safe navigational channel and potentially encountering hazards. Maintaining your course ensures that you continue to navigate safely through the channel without the risk of misalignment, which could lead you off track.