Question 48 RVR02 - Master of LT 500-1600 GRT

The Correct Answer is D. **Why option D ("at all times") is correct:** The requirement for maintaining a proper look-out is fundamental to the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 5 (Look-out). This rule mandates that "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" emphasizes that this duty is continuous and applies regardless of the time of day, weather conditions, visibility, or location (whether international or inland waters, as inland rules typically mirror or explicitly adopt this COLREG requirement). **Why the other options are incorrect:** * **A) only at night:** This is incorrect because maintaining a look-out is equally crucial during daylight hours when traffic density is often highest. * **B) at night and during restricted visibility:** While the look-out becomes critically important during these periods, limiting the requirement only to these times neglects the need for vigilance during clear daylight conditions when assessing collision risk and monitoring traffic is still mandatory. * **C) only during restricted visibility:** This is incorrect for the same reason as B. Restricted visibility is only one of the conditions under which a look-out is necessary; the duty applies continuously under all conditions.