Norfolk to Annapolis
We made the same trip last May, 24 hours is about the correct time. We sailed straight through and stuck to the western side of the shipping channel, by doing so you avoid the tidal influences of the rivers and Calvert Cliffs Nuclear Power Plant area (you will see it, its lit up like a Christmas tree.) Our method was to hug the shipping channel bouy line, but staying west out of the shipping lanes. The biggest hazard noticed were the tugs in tow, their lights can be confusing against the shoreline. We draw 6'' and stayed in 20-30'' of water.
Best of luck on your sail north. We sail out of Herrington Harbour North, a couple of hours south of Annapolis, look forward to seeing you on the Bay!
Hank and Lisa