Question 60 ONC03 - Master LT 500-1600 GRT

The Correct Answer is A **Explanation for Option A (Correct Answer):** The dangerous cargo manifest (often required under regulations like the IMDG Code or various national maritime regulations) is primarily focused on identifying the hazard, the quantity of packages, the type of packaging, and how the material is handled and stowed. While overall weight (gross weight) is often listed for logistical purposes, regulatory requirements for the dangerous cargo manifest specifically require the **gross mass (or gross weight)** of the hazardous cargo, which includes the weight of the packaging, for stability, handling, and regulatory purposes. The **net weight** (the weight of the material alone, excluding the packaging) is generally included on the Shipper's Declaration for Dangerous Goods (DGD) to determine packaging group limits and quantity thresholds, but it is typically **not** a required field on the consolidated vessel manifest itself, which uses gross weight for stowage planning. **Explanation of Incorrect Options:** **B) A description of the packaging (drums, boxes, etc.):** This information is crucial for the manifest. It dictates handling procedures, confirms compliance with packaging regulations, and informs the crew of the physical configuration of the cargo. Therefore, the manifest must include the type of packaging. **C) The stowage location of hazardous material aboard the vessel:** Knowing the precise location (e.g., Hold 2, starboard side, row 05) is mandatory for the manifest. This allows the master and crew to ensure proper segregation, accessibility in an emergency, and overall vessel stability. **D) UN identification numbers:** The UN identification number (e.g., UN 1203 for gasoline) is the fundamental piece of information used globally to identify the substance and its hazard class. It is essential for inclusion on the manifest to immediately identify the danger.