The Raider Wolf Ship
The Wolf was a German auxiliary cruiser, raider, formerly Wachtfels.
The only enemy warship to enter Australian or New Zealand waters during World War 1.
Commanded by Karl August Nerger, she had a crew of about 400, an armament of seven 15cm guns, 458 mines and four torpedo-tubes. She also carried a two-seater seaplane, the Wolfchen.
The Wolf was a single-screw 5809 ton steamer, capable of a speed of eleven knots, powered by triple-expansion engines, and had two masts and a single funnel. Lbd 419 x 56.2 x 29.6 ft depth.
The Wolf left Hamburg 17 December 1916 and was successful in laying mines off the south-east Australian coast, and capturing several vessels, including the Burns, Philp liner Matunga.
The Wolf was the most successful German raider of World War I, capturing or sinking 14 ships totalling 135,000 tons during a cruise of some 64,000 miles. At sea for 15 months in the Atlantic, Indian and Pacific Oceans, the Wolf drew allied warships into the search for her and 
away from other areas in which they were sorely needed.
Was your relative taken prisoner by the Wolf?