Drag to compare unlit and lighted · live NOAA chart, not for navigation
The twin ports, Minnesota & Wisconsin
Duluth–Superior Harbor
Two entrances from Lake Superior, with a sheltered harbor stretching behind the long barrier shore.
Duluth and Superior share the sheltered water behind Minnesota Point and Wisconsin Point. At the Duluth entrance, a white flashing light and a steady green light mark the south breakwater; farther along the shore, Superior Entry has its own pattern of red and green. The landscape frame connects both gateways to Lake Superior.
Signature lightDuluth Harbor South Breakwater Inner LightFl 5s 68ft 13.9MOne white flash every 5 seconds
- Frame
- 20 × 16 in
- Print scale
- 1 : 43,300
- Navigation aids
- 192
- Lights
- 104
104 lights glow on the finished chart, each through a pinhole fed by its own LED. The other 88 markers, such as daybeacons and unlit buoys, are printed on the chart.
6 light rhythms on this chart
- Flashing
- Composite group
- Quick
- Occulting
- Isophase
- Fixed
Lights on this chart
- Duluth Harbor South Breakwater Inner LightOne white flash every 5 secondsFl 5s 68ft 13.9M
- Duluth Harbor South Breakwater Outer LightA steady green light that never blinksF G 44ft 13.9M
- Superior Entry South Breakwater LightOne green flash every 5 secondsFl G 5s 70ft 13M
- Duluth Harbor North Pier LightA red light, on and off for equal times, a full cycle every 6 secondsIso R 6s 43ft 10.4M
- Superior Entry Inner North Pierhead Light 2AA red light, on and off for equal times, a full cycle every 6 secondsIso R 6s 35ft 6.1M
- Superior Entry Inner South Pierhead Light 1A green light, on and off for equal times, a full cycle every 6 secondsIso G 6s 35ft 4.3M
Opens in the designer, ready to adjust the area, frame and title. Starting at $299, based on frame size, LED configuration and custom programming. Data current to November 5, 2026.