Fog, mist, falling snow, heavy rainstorms, sandstorms or any other similar causes can make conditions that hamper visibility. Sound signals for vessels in restricted visibility, whether underway, at anchor or aground, day or night, are the subject of Rule 35 (COLREGS). The bell and gong are added into the mix of whistle sounds used as options for restricted visibility signals. Rule 35 is fairly complex, and it is advised to have a highlighter in hand while reading through it. Read More
