Explanation: 47 CFR Part 80, Subpart W governs GMDSS radio logs. Option D is correct because §80.409(e)(2) explicitly requires entries for "All distress and urgency communications and safety communications originating on or received by the vessel." This includes communications affecting your own vessel or vessels in the vicinity, which are critical for maritime safety. Option A is incorrect. §80.409(d) permits GMDSS radio logs to be maintained in an approved electronic format, provided it's protected from alteration and printable. Option B is incorrect. §80.409(f) mandates that the radio log for a compulsory vessel must be retained onboard for "at least one year," not just 90 days. Option C is incorrect. Log entries are required for all relevant communications, including distress, urgency, and safety calls, regardless of whether they originate strictly within the vessel's *intended* Sea Area. The requirement is based on actual communication events, not pre-defined operational zones.