Rover (later renamed Southern Cross, Orizaba) was a steam yacht built in 1930 by Alexander Stephen and Sons in Linthouse, Glasgow, Scotland for Lord Inchcape, then chairman of the P&O.

[2] The yacht's figurehead was a likeness of Lord Inchcape's daughter, Elsie Mackay, who disappeared while trying to fly the Atlantic in 1928.

[3] With accommodation for up to 14 guests, the yacht was painted green and white at launch with a predominantly silver-coloured dining room.

[5] After Lord Inchcape's death aboard Rover in Monte Carlo's Port Hercules harbour on 23 May 1932,[6] rumours circulated that the Aga Khan would buy the yacht,[7] while a rumoured deal with King Carol II of Romania also fell through.

[2][9] She was subsequently sold to Swedish entrepreneur Axel Wenner-Gren, under whose ownership she helped rescue survivors from the SS Athenia, the first ship to be sunk by Nazi Germany in World War II.