Question 33 TK01 - Tank Vessel Assistant - Dangerous Liquids

The Correct Answer is C **Why Option C is Correct:** Option C, "A red light visible all around the horizon," is the standard visual signal required under various maritime regulations (such as those enforced by the US Coast Guard and recognized internationally for safety in port operations) to indicate that a vessel is currently engaged in the transfer of hazardous cargo, specifically flammable or combustible liquid cargo (like oil or chemicals). The red light serves as an immediate, 360-degree visible warning to all surrounding vessels and personnel, signifying a heightened danger zone due to the inherent risks of explosion or fire during bunkering or cargo transfer operations. This signal is required to be displayed from sunset to sunrise. (During daylight hours, a red flag is displayed). **Why Other Options Are Incorrect:** * **A) A green light visible all around the horizon:** A green light is typically used in maritime contexts to denote the starboard (right) side of a vessel or, in some specific regulatory contexts (like bridge clearance or channel markers), to indicate safety or permission to proceed. It does not signify hazardous cargo transfer operations. * **B) An illuminated red and yellow caution flag:** While a red flag is the correct signal during daylight hours, the specified flag color combination (red and yellow) is not the standard requirement for indicating flammable cargo transfer. Furthermore, while the flag must be illuminated if displayed at night, the primary *nighttime* signal is a fixed red light, not an illuminated flag. * **D) A flashing yellow light:** Flashing yellow lights often indicate special operations (like dredging, towing, or pilot duties) or restricted maneuverability, or they might be used on buoys to mark caution areas. They are not the designated universal signal for the transfer of flammable liquid cargo.