Drag to compare unlit and lighted · live NOAA chart, not for navigation
Chicago Harbor & the Four-Mile Crib
Chicago Lakefront
The city's breakwaters and harbors on Lake Michigan, lit from Montrose to the river mouth.
Chicago Harbor Light has stood at the end of the breakwater since 1893, flashing red every five seconds. Up and down the lakefront, the harbors at Montrose, Belmont and Diversey each have their own lit entrances, with the old water-intake cribs glowing offshore.
Signature lightChicago Harbor LightFl R 5s 82ft 13MOne red flash every 5 seconds
- Frame
- 12 × 16 in
- Print scale
- 1 : 52,500
- Navigation aids
- 98
- Lights
- 75
75 lights glow on the finished chart, each through a pinhole fed by its own LED. The other 23 markers, such as daybeacons and unlit buoys, are printed on the chart.
5 light rhythms on this chart
- Flashing
- Quick
- Occulting
- Isophase
- Fixed
Lights on this chart
- Chicago Harbor LightOne red flash every 5 secondsFl R 5s 82ft 13M
- Four-Mile Crib LightOne white flash every 15 secondsFl 15s 66ft 8.7M
- Chicago Harbor Southeast Guide Wall LightA white light, on and off for equal times, a full cycle every 6 secondsIso 6s 48ft 7.8M
- Chicago Harbor Entrance South Side LightOne green flash every 4 secondsFl G 4s 27ft 5.2M
- Chicago Harbor Oak Street Breakwater Northeast End Light 2One red flash every 2.5 secondsFl R 2.5s 26ft 5.2M
- Chicago Harbour Outer Breakwater South End LightA red light, on and off for equal times, a full cycle every 6 secondsIso R 6s 27ft 5.2M
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.