In the same campaign along the coasts of southwestern Turkey, he also sank the French auxiliary aviso Paris II, the converted naval trawler Alexandra[1] and a number of other Allied vessels in 1917.

Ertuğrul was recently rediscovered in Turkey thanks to research done on him and on the shipwrecks off the coast in Ağva Bay[3] near Kemer in Antalya Province by the skin diver and amphora collector Mustafa Aydemir.

A book, based on the account that he had typewritten himself in 1934, on Atatürk's personal encouragement, "Ben bir Türk zabitiyim" (I am a Turkish officer), was re-edited by Aydemir and supplemented with photographs and archive documents, notably from France.

Prior to Ertuğrul's account having been made public, easily available information on the officer was restricted to a few lines in the memoirs of Liman von Sanders and Field Marshal Erich Ludendorff and documents and literature regarding Ben-my-Chree's sinking.

Ertuğrul's story requires more in-depth research, with a number of points included in his account awaiting further clarification, notably his mention of another British naval vessel that he claimed to have sunk and believed to be the actual ship commanded by Charles Rumney Samson; HMS Dard.