Chart correction NNU-322945 — chart 257

изменена характеристика · St. Clair Flats Canal Lighted Buoy 4 · R "4" Fl R 2.5s · Structure: Red. Remark: Year round buoy unlighted from Dec. 14 to Apr. 7.

Source: NOAA Nautical Updates — critical (US waters)

Reference information — always verify against official Notices to Mariners before navigation.