5.3 Interpretation of "not in the same vertical line unless segregated by a deck" in relation to horizontal segregation
In the above paragraphs, horizontal segregation is not referred to The interpretation of "not in the same vertical line unless segregated by a deck" should be discussed in relation to horizontal segregation.
The risk of stowage of "containers packed with incompatible dangerous goods" in sensitive vertical lines under deck not corresponding to the reference container on deck is not significant because the risk is secondary. We therefore consider that "containers packed with incompatible dangerous goods" can be stowed in sensitive vertical lines under deck not corresponding to the reference container on deck. Similarly, such containers can be stowed in sensitive vertical lines on deck where the reference container is not stowed in sensitive vertical lines under deck. These understandings are illustrated in Figures 2-1 and 2-2.
Figure 2-1 illustrates the above-mentioned understanding. In the left figure, the reference container packed with dangerous liquids is stowed in a vertical line not on a hatchway cover and one container space is segregated in athwart ship direction. In this case, "a container packed with incompatible goods" can be stowed in sensitive vertical lines under deck, when "not in the same vertical line unless segregated by a deck" is required. In the right figure, the reference container is stowed in a vertical line on the left hatchway cover and one vertical line on the centre hatchway cover is segregated. In this case, "a container packed with incompatible goods" can be stowed in sensitive vertical lines under deck not corresponding to the left hatchway cover.
Figure 2-2 also illustrates the above-mentioned understanding for cases where the reference container is stowed under deck. In both figures, reference containers are not stowed in sensitive vertical lines. In these cases, "a container packed with incompatible goods" can be stowed in sensitive vertical lines on deck.
6 Examples of segregation based on the interpretation
6.1 Away from .1 - Closed versus Closed
The segregation requirements for "Away from .1 - Closed versus Closed" are governed by Table 1. Figure 3 is the example of the segregation. Because "one on top of the other" is permitted, the segregation on container ships with partially weatherproof hatchway covers is the same as one on conventional container ships with weatherproof hatchway covers.
6.2 Away from .1 - Closed versus Open
The segregation requirements for "Away from .1 - Closed versus Open" are governed by Table 2. Figures 4-1 to 4-5 are examples of segregation when the reference containers are closed type. When the reference container is open type, "NOT in the same vertical line unless segregated by a deck" is required for vertical segregation and Figures 1-1 to 1-6 can be the examples.
