What does a blue light with tones of all dashes on the marker beacon indicate during an ILS approach?

A blue light with tones of all dashes on the marker beacon during an ILS approach indicates that you are near glide slope intercept. This visual and auditory alert is important for pilots as it helps them to understand their position in relation to the ILS glide slope. As you approach the glide slope intercept point, the blue light signals that you are getting closer to the final descent path that you will follow towards the runway. Recognizing this cue allows pilots to prepare for the descent phase of their approach, ensuring a timely and safe transition onto the glide slope for landing. Understanding the significance of the marker beacon signals is crucial for maintaining situational awareness and ensuring compliance with the instrument approach procedures.