Question 48 RVR04 - Master or Mate of LT 200 GRT

The Correct Answer is D. **Why option D ("at all times") is correct:** The requirement for maintaining a proper look-out is a fundamental principle of safe navigation governed by the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 5, which applies to both international and inland waters. Rule 5 states: > "Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision." The phrase "at all times" explicitly mandates continuous vigilance, regardless of the time of day, weather conditions, or visibility. **Why the other options are incorrect:** * **A) only at night:** This is incorrect because maintaining a look-out is equally crucial during the day (daylight hours), especially when traffic may be heavy or when navigating in narrow channels. * **B) at night and during restricted visibility:** This is incorrect because, while the look-out requirement is critical during these times, restricting it only to these conditions fails to account for clear weather, daylight operations, and navigating in clear traffic, where dangers still exist. * **C) only during restricted visibility:** This is incorrect. Though visibility requires heightened caution, the risk of collision is always present, even in clear weather. A vessel must maintain situational awareness at all times to prevent incidents.