When is a diamond shape exhibited?

When is a diamond shape exhibited?

• A. Only at night
• B. By day in all weathers.
• C. When towing astern
• D. When anchored

Answer: (B)

Day shapes are used to show a vessel’s status during daylight. A single diamond indicates the vessel is constrained by its draft, meaning it cannot maneuver freely in a channel or narrow passage. This signal is shown by day in all weathers, so it remains visible in any weather while there’s daylight; at night, illumination replaces day shapes with lights. The other options don’t fit because they describe different situations or are signals used at night rather than a daytime diamond.

Day shapes are used to show a vessel’s status during daylight. A single diamond indicates the vessel is constrained by its draft, meaning it cannot maneuver freely in a channel or narrow passage. This signal is shown by day in all weathers, so it remains visible in any weather while there’s daylight; at night, illumination replaces day shapes with lights. The other options don’t fit because they describe different situations or are signals used at night rather than a daytime diamond.