Explanation: Ship station logs are crucial operational records and must be readily accessible for current entries and potential inspection. FCC regulations (47 CFR § 80.117(a)) require these logs to be kept at the station. The most practical and compliant location during a voyage is the principal radiotelephone operating position, ensuring the operator can make timely and accurate entries and that they are available if needed. Keeping them in a strongbox (B) would make them inaccessible for continuous logging. They are station documents, not personal property of the operator (C), and must remain with the station. Turning them over to the ship’s master every time an operator goes off duty (D) is impractical; they need to stay at the operating position for the next watch stander.