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Anchor as used on the first Royal Navy nuclear submarine, HMS Dreadnought, at Anchor Walk, National Maritime Museum, Greenwich, UK |
Submarines don't like to use their anchors. They have a nasty habit of not coming back up when we try to hoist them, and since they are stored in a place we can't get to, there's nothing we can do about if anything goes wrong. On one of my boats, we were supposed to anchor overnight outside Port Said in preparation for the next morning's transit of the Suez Canal. Instead, we lowered our outboard motor, and used it to stay in the same spot. This was just as well, because a huge ship transporting new cars had trouble communicating with port control, and ended up trying to anchor where we were, so we had to scoot out of the way rather quickly.

This is an excellent analogy, so let's run with it.