Question 28 TK02 - Tank Vessel Assistant - Liquefied Gas

The Correct Answer is A. A red light visible all around the horizon is correct because according to international maritime regulations (often reflected in local port regulations and maritime standards, such as those governing tank vessel operations and signals in the US Coast Guard regulations, 33 CFR), vessels handling flammable or combustible liquid cargo are required to display a specific warning signal. This signal is an all-round red light, visible from all directions, displayed at the masthead or highest point, day and night, to warn other vessels and port personnel that a dangerous cargo transfer operation is in progress. This signal immediately signifies the presence of a high fire or explosion risk area. **Why other options are incorrect:** B) **A green light visible all around the horizon:** Green lights are typically associated with navigational sidelights (starboard side) or sometimes used to indicate the right-of-way or clearance. They are not the standard regulatory signal for flammable cargo transfer operations. C) **A flashing yellow light:** Flashing yellow lights are commonly used in maritime contexts to denote special operations, vessels restricted in their ability to maneuver (like dredging operations), or submarine cables/pipelines, but they are not the internationally recognized standard signal for flammable liquid cargo transfer. D) **An illuminated red and yellow caution flag:** While flags (specifically the 'B' flag, or Bravo flag, which is entirely red) are used during the day to indicate handling or transporting dangerous goods, an illuminated red and yellow flag is not the prescribed nighttime electrical light signal for indicating flammable liquid cargo transfer. The standard light signal is the all-round red light.