SS Blommersdijk was a Dutch-owned turret deck ship that was built in England in 1907 as Blötberg.

In October 1916 a U-boat stopped her in the Atlantic, inspected her cargo, ordered her crew to abandon ship, and sank her.

[4] Müller bought the ship to carry iron ore from the port of Oxelösund in Sweden.

She was named after the Swedish village of Blötberget, where the ore was mined, 150 miles (240 km) northwest of Oxelösund.

On 27 January 1916 NASM bought two turret deck ships from Müller & Co: Blötberg, and the larger Grängesberg, and renamed them Blommersdijk and Beukelsdijk respectively.

[3] Germany later admitted that Rose had been wrong to sink Blommersdijk, and paid full compensation for both the ship and her cargo.