Question 50 TK02 - Tank Vessel Assistant - Liquefied Gas

The Correct Answer is C **Explanation for Option C (Declaration of Inspection):** U.S. regulations (specifically those governed by the U.S. Coast Guard, often found in 33 CFR parts concerning transfer operations, like 33 CFR § 156.120) mandate that before beginning any transfer of oil or hazardous materials to or from a vessel, the persons in charge (PIC) on both the vessel and the facility must complete and sign a document certifying that all safety precautions and regulatory requirements have been met. This document is known as the **Declaration of Inspection (DOI)**. The DOI confirms that pre-transfer checks (such as communication systems, mooring, connections, emergency shutdown procedures, and availability of spill response equipment) have been conducted and that both PICs agree the operation can safely proceed. **Explanation for Incorrect Options:** * **A) Oil Record Book:** The Oil Record Book (required by MARPOL Annex I) is used for recording mandatory operations related to oil or oily mixtures (such as ballast discharge, sludge disposal, and bunkering) after they occur. It does not serve as the pre-transfer safety checklist required for the commencement of the operation. * **B) valve inspection record:** While valve inspections are crucial for safety, this specific record is part of routine maintenance or compliance documentation. It is not the legally required pre-transfer document that must be signed by both persons in charge immediately before the transfer begins. * **D) machinery log:** The machinery log (or engineering log book) documents the operational status, maintenance, and major events concerning the vessel's propulsion and auxiliary machinery. It is an operational record for the vessel's engineering department and is not the official document used to authorize the commencement of oil or hazardous material transfer between the vessel and the facility.