The RMS Titanic was launched from Belfast, where it was also constructed.
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The USS Nautilus, the world's first nuclear-powered submarine, was decommissioned in California.
An atomic submarine circumnavigated the globe.
The crew of the Union Star lost their lives along with all eight lifeboat volunteers who tried to save them.
The MV Braer runs aground on the coast of the Shetland Islands.
The Soviet K-278 Komsomolets nuclear submarine caught fire and sank off the coast of Norway.
