Most of the Panhandle is water behind something. Big Lagoon, Santa Rosa Sound, Choctawhatchee Bay, East Bay and Apalachicola Bay all sit inside barrier sand, and the way out to the Gulf is through a short list of passes. That shapes how you navigate here. The deep water in a Panhandle bay is usually a cut somebody dredged, so the useful question is rarely how deep the bay is and almost always where the edge of the channel runs.
The Florida Panhandle pack is built from 107 official NOAA ENC cells. Inside it are 55,980 individual charted soundings, 6,882 depth areas, 6,719 depth contours, 421 dredged areas and 17 charted anchorage areas, along with 1,733 lateral beacons, 936 lateral buoys and 1,278 charted lights. The download is 12 MB, so the whole region fits on the phone before you leave the dock.
The 1,733 lateral beacons in this pack are the seventh largest count of any of the 18 US regions Helm builds packs for, and the 936 lateral buoys rank ninth. A beacon stands on a pile driven into the bottom. It does not swing with the current and it does not get pulled and reset, which is why so much of the marking in these bays is done with beacons instead of floats. The channels they edge were cut in one place and are expected to stay there.
There are 1,278 charted lights across the same water, so most of what you follow after dark is already on the chart with its characteristic beside it. Safe water marks are the other story. The whole region carries five. You do not pick up a fairway mark out in the Gulf and ride it in here. You find the first pair of channel marks and you stay between them.
| In the chart pack | Count |
|---|---|
| NOAA ENC cells | 107 |
| Charted soundings | 55,980 |
| Depth areas | 6,882 |
| Depth contours | 6,719 |
| Lateral buoys | 936 |
| Lateral beacons | 1,733 |
| Charted lights | 1,278 |
| Anchorage areas | 17 |
| Bridges | 318 |
| Overhead cables | 206 |
| Dredged areas | 421 |
| Charted wrecks | 490 |
| Charted obstructions | 2,041 |
| Underwater rocks | 137 |
| Restricted areas | 175 |
| NOAA tide prediction stations | 79 |
Counted from the Helm chart pack for Florida Panhandle, built from official NOAA electronic navigational charts. The pack downloads at about 12 MB.
Every dredged area in the ENC carries its own depth, and the spread across the Panhandle's 421 of them is worth knowing before you trust the word dredged. The median is 3.6 m, a shade under 12 ft. The deepest carries 14.6 m, about 48 ft, which is ship water. The shallowest carries 0.2 m.
A dredged area charted at 0.2 m is a record that somebody cut a channel there once. It says nothing about this afternoon. Helm draws each area with the depth it carries and puts the survey date beside the number, so a maintained cut and an old one look different on screen instead of both reading as channel. Where a planned leg runs down one of them, the explanation for that leg says which kind of number it used.
The pack holds 490 charted wrecks, 2,041 charted obstructions and 137 underwater rocks. The proportion is the useful part. Close to fifteen times more obstructions than rocks means the hazards in this water mostly arrived, and things that arrive collect where people work, along channel edges and in the bays that carry traffic. Set the obstruction count against the 55,980 soundings and it comes out at roughly one charted obstruction for every 27 soundings in the region, which is dense enough that you should expect to see them on screen at any working zoom rather than only when you go looking.
There are also 128 charted marine farming areas, fifth among the 16 US regions that have any at all. That is working bottom with gear in it, and Helm draws those boundaries instead of leaving open blue where they sit. The 175 charted restricted areas get the same treatment, and a route that would clip one tells you how much of it the straight line would have crossed.
Air draft is a live question in this region in a way it is not on open coast. The bays are narrow and crossed often, and a cable span runs over water you would otherwise read as clear. Helm checks the charted vertical clearance against the air draft you entered, and it reads the down position of an opening bridge as well as fixed spans, so a bascule you would have to wait for does not look like sky.
You can see how much of this water is crossed from the tide stations alone. Three of the ones inside the box are named for the bridge they sit at: the Apalachicola River A&N RR bridge, the Hwy 65 bridge at East Bayou on East Bay, and the Hwy 2321 bridge on Deer Point Lake in North Bay.
NOAA publishes tide predictions for 79 stations inside the Panhandle box. That is dense enough that the station nearest you is usually in the same body of water you are floating in rather than out on the coast, which matters wherever a bay and the pass outside it are not doing the same thing at the same hour. A few of them, to give the idea:
Dog Island is the one to notice. A single island carries a separate station at each end, which is the resolution NOAA keeps for this stretch. Helm reads the nearest station to your position and labels the height with where the figure came from, whether that is a prediction corrected by a live gauge or a curve computed on the device with no signal. How that labelling works is the same everywhere and is covered under weather and tides.
These counts describe what the chart pack carries, not the state of the water today. Charted data ages, channels shoal and marks move. Keep a lookout and verify locally.
It runs from 87.6 degrees west to 84.3 degrees west, and from 29.5 north to 30.9 north. On the water that means Alabama Point and Big Lagoon at the western edge, through Santa Rosa Sound, Choctawhatchee Bay, East Bay and North Bay, then east past Cape San Blas to Apalachicola Bay, Carrabelle, Dog Island and Alligator Point. Water further down the peninsula is in the Florida Gulf Coast pack, and the coast to the west is in the Alabama, Mississippi and Louisiana pack.
The nearest one to where you are. Apalachicola Bay has Cat Point in it, with Apalachicola itself, the station at the Apalachicola River A&N RR bridge and Eleven Mile over in St. Vincent Sound all close by. There are 79 NOAA tide prediction stations inside the Panhandle box, so the one Helm reads for you is rarely far off.
The pack carries 421 charted dredged areas. Half of them are charted at 3.6 m or less, a shade under 12 ft. The deepest carries 14.6 m, about 48 ft, and the shallowest carries 0.2 m. Those are charted depths rather than a survey of the channel as it sits today, and Helm shows the date the number came from next to the number, so an old cut does not read the same as a maintained one.
Helm Boating