Chart correction NNU-323711 — chart 124
изменена характеристика · San Francisco Approach Lighted Whistle Buoy SF · RW "SF" Mo (A) WHIS AIS · Red and white stripes; AIS MMSI: 993692001; No topmark will be shown on this aid as required by IALA standards due to weather.
Source: NOAA Nautical Updates — critical (US waters)
Reference information — always verify against official Notices to Mariners before navigation.