Question 29 TV03 - Towing Vessels - Western Rivers

The Correct Answer is B Option B, the **alternately flashing red and yellow light**, is correct because it is the specific signal designated in the U.S. Inland Navigation Rules (specifically 33 CFR § 88.13) for a commercial vessel engaged in public safety activities. This distinct signal is used to alert other mariners that the vessel is actively involved in safety, search and rescue, or other governmental functions requiring special attention. Here is why the other options are incorrect: * **A) flashing yellow light:** This light is designated in the Inland Rules for air-cushion vessels operating in the nondisplacement mode (hovercraft) or for certain high-speed craft, not for public safety activities. * **C) alternately flashing blue and red light:** While this combination is commonly associated with land-based emergency vehicles (police, fire), it is not the standard or prescribed identity light combination for commercial vessels engaged in public safety under the U.S. Inland Navigation Rules. The Rules specify alternately flashing *red and yellow*. * **D) flashing blue light:** In the Inland Rules, the flashing blue light is designated solely for vessels operated by law enforcement personnel when engaged in enforcement duties. It is not the signal for general public safety or search and rescue activities carried out by a commercial vessel.