Three methods of interconnecting cargo systems at the manifold on deck include?

The methods of interconnecting cargo systems at the manifold on deck are critical for efficient operations on tankers. The combination of runaround, mixmaster, and jumper reflects established practices used in the industry for managing cargo transfers and maintaining system integrity.

Using a runaround allows for connecting different cargo lines without affecting the main flow, ensuring that the operation can continue smoothly. The mixmaster serves the purpose of blending different types of cargo or managing different cargo tanks, making it essential for certain operational scenarios. A jumper can be employed to create a temporary connection between two points in the system, facilitating quick changes or repairs without disrupting the overall system.

These methods are designed to enhance flexibility and safety in handling various types of cargo, ensuring that operations can adapt to changing circumstances while minimizing risks. The other options provided refer to methods not commonly recognized in standard tankerman practices, which further solidifies why the selected answer is appropriate.