The ship signalled her sister ship and then stood on.
Requirements for the test items in this program are applicable for sister ship.
The real Yamato was, along with its sister ship the Musashi, the largest battleship ever built.
In Soviet hands it was the Varyag (a sister ship is the only operational carrier in Russia's navy).
a 2500 tonne coastal tanker is nearing completion. It will be launched at the end of December. Its sister ship is currently taking shape on the berth.
