I am sailing a Catalina
18 in the relatively shallow waters of the Caloosahatchee River around Ft. Myers, Florida
. There are a number of bridges in the area, and the NOAA charts
seem to show that, generally, where these bridges are located, there is adequate water depth
for my boat (which draws only about 2.5 feet). I am confident that I have ample water depth
in the main channel under the central span of these bridges.
My question is this. Because the NOAA charts
do not indicate any special water depth
limits or obstructions under any portions of the bridges, can I assume that the water
under the other spans of the bridges is what the NOAA chart is otherwise showing for that part of the river? Or do I need to be extra careful about using anything other than the main channel under a bridge, even though the chart does not show any special depth
limitations under other parts
of the bridge?