The span reported on below sits in the heart of the AICW’s passage through Jacksonville Beach, Florida.

Try to hit this bridge at slack tide. Otherwise you will be facing a swift current (4+ kts) which will test your nerves and
helmsmanship passing under the bridge.
s/v MicMac

First off, it’s the ebb current that’s the faster current, with speeds up to 4 kts. The flood is about a knot slower. Moreover, this issue exists only in the immediate vicinity of the Atlantic Boulevard bridge. Looking at the chart, the opening between the bits of land to the north of the bridge taper down, but open quickly to the south. We recently passed through the area with a 3 kt flood current and had little trouble under the bridge and only moderate turbulence south of the bridge. The St. Johns River crossing, by comparison, was harder, with strong cross current and turbulence.
Rick Emerson

Click Here To View the Eastern Florida Cruisers’ Net Bridge Directory Listing For The San Pablo/Atlantic Boulevard Bridge