Today while coming in on the Expressway Visual to 31 in LGA while turning final, we where told...
"Colgan 4848 low altitude alert altimeter blah blah blah.."
I have gotten this as well going into BOS while on visual approaches. We have been on or above the Glide Slope in visual conditions. One time we where actually above the GS as we where following a 757 and didn't want to hit the wake.
What is the deal with these? What is the proper way for me to respond? Should I say 'roger' or something like 'we are visual'?