Best anchorages and harbours in United States

Old Bridge Marina

Small 53-berth marina on the Caloosahatchee River, directly across the Edison Bridge from downtown Fort Myers.

Old Ferry Marina

Marina on the New River at Sneads Ferry, North Carolina, close to the Intracoastal Waterway and New River Inlet.

Old Greenwich Yacht Club

Member yacht club inside Greenwich Cove at Greenwich Point, on the Connecticut shore of Long Island Sound.

Old Harbor Marina

Full-service marina at the eastern end of Clinton Harbor, in Clinton, Connecticut, off Long Island Sound.

Old Lyme Marina

Full-service marina on the lower Connecticut River near Calves Island, Old Lyme, about 3 miles up from Long Island Sound.

Old Man's Boat Yard

Boatyard in Mount Sinai Harbour on the north shore of Long Island, formerly the Davis Island Boatyard.

Old Mill Yacht Club

Private boating club on Shellbank Basin at Howard Beach, Queens, on the north shore of Jamaica Bay.

Old Point Comfort Marina

Marina at Fort Monroe on Old Point Comfort, Hampton, Virginia, on the north shore of Hampton Roads where the Chesapeake Bay meets the harbour.

Olde Towne Marina

Compact marina on Spa Creek in the centre of Annapolis, Maryland, a short walk from City Dock.

Olde River Yacht Club

Private deep-water yacht club on the Cuyahoga River at Whiskey Island, Cleveland, just inside the river mouth on Lake Erie.

On-Shore Marina

Private 65-berth dockominium on Thames Street, in the heart of Newport Harbour, Rhode Island.

One Island Park Marina

Superyacht marina on Terminal Island off the MacArthur Causeway, at the entrance to Government Cut in Miami Beach, Florida.

Ontonagon Marina

Village marina at the mouth of the Ontonagon River on the south shore of Lake Superior, at the foot of the Porcupine Mountains in Michigan's Upper Peninsula.

Open Bay Marina

Full-service marina on Merrick Bay at Merrick, on the south shore of Long Island, New York.

Orcas Island Yacht Club

Private club moorage on the north shore of West Sound, Orcas Island, in the San Juan Islands of Washington state.

Orchard Creek Marina

Family-run marina on a deep-water canal off Orchard Neck Creek at 57 Ocean Avenue, Center Moriches, on the north shore of Moriches Bay.

Oregon Inlet Fishing Center

Charter fishing marina at the north end of the Marc Basnight Bridge, on Oregon Inlet south of Nags Head, North Carolina.

Orient Yacht Club

Members' yacht club at the foot of Village Lane in Orient, on the North Fork of Long Island, New York.

Orienta Yacht Club

Member yacht club in the East Basin of Mamaroneck Harbour on Long Island Sound, in Mamaroneck, New York.

Ortega River Marina

Marina on the Ortega River in Jacksonville, Florida, within the cluster of yards near the river entrance off the St. Johns River.

Oselka's Snug Harbor Marina

Family-run full-service marina on the Galien River at New Buffalo, Michigan, near the southern tip of Lake Superior's neighbour, Lake Michigan.

Osprey Marina

Marina on the Atlantic Intracoastal Waterway at Socastee, near statute mile 373, in the Myrtle Beach area of South Carolina.

OSPREY OAKS MARINA

Waterfront marina on the Newport River near Newport, North Carolina, with wet slips, a public boat ramp and a service yard.

Ossineke Marina

Small private marina at the mouth of the Devil River where it meets Lake Huron, in the village of Ossineke on the Michigan Sunrise Coast.

Ossining

Anchorage on the east bank of the Hudson River off the village of Ossining, in Westchester County about 30 miles north of Manhattan.

• Sheltered NE, E, SE

Oswego

Anchorage off the mouth of the Oswego River on the south shore of Lake Ontario, sand bottom, protected from SE, S and SW winds.

• Sheltered SE, S, SW

Oswego Marina

Deep-water marina at the mouth of the Oswego River on Lake Ontario, at the northern terminus of the Oswego Canal.

Ottawa Beach Marina

Small county-run marina on the west side of Lake Macatawa at Holland, Michigan, just inside the channel to Lake Michigan and the closest harbour to its mouth.

Otter Creek Landing Yacht Club

Private residential yacht club on Myrtle Grove Sound at Carolina Beach, with about 100 berths split across two basins on Otter Creek Canal.

Otter Creek Marina

Full-service marina on Otter Creek, a tributary of the Bush River, at Edgewood in Harford County, Maryland.