RMS Dunottar Castle was a
Royal Mail Ship that went into service with the Castle Line (and its successor, the
Union-Castle Line) in 1890 on the passenger and mail service between Britain and South Africa. In 1913 the ship was sold to the
Royal Mail Steam Packet Company as the
Caribbean. After the outbreak of the First World War she served as HMS
Caribbean, first as a
troop ship and then as an
Armed Merchant Cruiser, until she sank in a storm off the Scottish coast on 27 September 1915.