Harbor Key Bank is at the northwestern end of Big Spanish Channel which itself lies alongt the western edge of Florida Bay west of Marathon, FL. The destroyed daybeacon marks the northern tip of shallow water of the west side of the channel.
FLORIDA – BIG SPANISH CHANNEL TO JOHNSTON KEY: Hazard to Navigation
Harbor Key Bank Daybeacon 55 (LLNR 12665) is destroyed. The steel pile is marked with a TRLB, displaying Fl Q G characteristics. Mariners are advised to use extreme caution while transiting the area. Chart 11448 LNM 41/17