system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do container ships secure their cargo such that the shipping containers at the top of those tall stacks do not fall off into the ocean?
gpt
ISO containers (aka conexes, shipping containers,) are modular, they have points where you can attach each container at each corner to the containers around the one you're mounting. When you do this, the set of containers act as a single block and not singular containers.