Channel 5 Depths
I think Captain ran into some unusually low water levels (see below), due to wind tides. However, caution is advised in the areas he notes.
Your keys guide is being put to good use on my trip. The wind is howling and it's nice to have a reference to figure out where we can hide.
FYI, we touched the bottom (5' 1" draft) in the middle of the channel approaching Channel 5 from Hawk. We were probably 100-150 left of the first red, right on the line on my chartplotter. The tide was -0.2' at the time.
Then, in on the way to Matecumbe Bight, we were in 5.4' to 5.9' of water most of the way, where the chart said 7'. Combination of the low tide and 25 knot winds I suppose, so didn't surprise me as much as the Channel 5 depth did.