Just north of the St. Johns River at Jacksonville FL is a new spot to keep clear of. There is shoaling building in from the east at the mouth of Garden Creek. We saw 7.2 feet at +3.8 feet of tide. This shoal has 3.4 feet at low water. Stay slightly to the red side of center and you’ll see 12 feet. The shoal clearly shows in the Navionics Sonar Chart. Because we had significant tidal help our track shows we intentionally crossed one of these shoals to confirm the depths shown on the Navionics Sonar Chart.