Big Pass information as of November 12th, 2016.
Soundings were taken on November 8th , 2016. The course remains unchanged as does the controlling depths of 5.5'.
The course heading out starts 114 yards WNW of Red BP8 at BPS8 27°16.679'N 082°34.365'W. Head about 149M for .16 nm to BPS7 at 27°16.537'N 082°34.272'W. Then continue on 173M for .28 nm to BSP4 at 27°16.262'N 082°34.233'W. Then proceed on a heading of about 178M for .14nm to BSP3 at 27° 16.125'N 82° 34.227'W. Finally head to a point in deeper water at 27° 15.930'N 82° 34.444'W between the entrance marks.
The course appears to have a controlling depth of about 5.5' at MLLW. Traverse this route slowly on a rising tide, mid-tide or above depending on your draft. As with any course, changes including shoaling have occurred and will continue. The coordinates were taken with GPS/WAAS, but your readings could be different. Please note that the actual MLLW may be less than the predicted MLLW on any given day. To see how the tide is running you can check St. Petersburg
for an approximation of the predicted vs. actual difference. The tides you need to get from the Sarasota Bay station.
It is highly advisable to take the next steps and view the most current chart so you can see all of the depth detail in the area.
To get the actual detailed chart you will need to use Google Earth. It is a free program which can be downloaded from this link. http://www.google.com/intl/en/earth/.
Once you have Google Earth installed, click on the following link to get the depth details of the most recent runs. http://goo.gl/HdXjzD
Then click on the .kmz file of interest and then download it to your system (after you delete the last run from your Google Earth). Enlarge the route to see all the detail. If you see an area on the course that has no contour lines you can be sure that it was at least 5.5' at the time the soundings were taken. Remember that the sand in Big Pass is constantly shifting and what conditions exist today are more than likely different than they were yesterday.