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Charlotte Harbor is shallow. Many areas marked 3-4ft at mean low water can be impassable at low tide. Always check tide charts before heading to sandbars or back-bay spots. Use NOAA Station #8725667 (Placida/Gasparilla Sound) as your primary reference.
Submerged oyster bars are everywhere in Pine Island Sound and the upper harbor. They'll shred a lower unit. Stick to marked channels when running, idle through unfamiliar water. Polarized sunglasses are essential.
Summer thunderstorms build fast — typically 2-5 PM. Charlotte Harbor can get extremely rough with steep 3-4ft chop in a squall. Have a bail-out plan and monitor VHF Ch. 16.
Slow speed / no-wake zones are strictly enforced. Fines start at $500+. Watch for "manatee swirls" — flat circles on the water surface. It's illegal to feed manatees or give them fresh water.
Extensive protected seagrass beds throughout the harbor. Avoid running your prop through grass — it's both illegal and destructive. If your motor kicks up grass, stop, tilt up, and pole or drift out.
When beaching at Cayo Costa or sandbars, always use a stern anchor. Pass currents are notoriously strong and can swing your boat onto shore or into other vessels.
Ch. 16 (emergency/hailing). Boca Grande Pass traffic: Ch. 13 during tarpon season. Bridge openings: Ch. 09. Dockmasters: hail on Ch. 16, move to Ch. 14 or 68. Sea Tow: Ch. 16.
Restaurant staff can't manage boat slips — always call the dockmaster or marina office directly. Weekend dock space fills fast, especially during tarpon season (Apr-Jul). Call 24-48 hrs ahead.
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