Duck Island Harbor
- Location: Long Island Sound
- Mile Marker: Northport Bay
- Lat / Lon: N 40° 55.760' / W 073° 22.880'
- Depth: 6-10 ft
- Description: Local ordinances forbid anchoring within 50 feet of the shore and require holding tanks or self-contained heads.
Holding:
0
Good, Sand, Mud
Wind Protection:
0
Somewhat exposed S
Wake Protection:
0
Somewhat exposed S
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