Hugh,
If there's one person I can think of who might have an answer on the ship, than it is Michael Lowrey. Put your question on the following forum :
http://uboat.net/forum/list.php?f=5
Michael has about all the shiplosses you can imagine on WW I. I wasn't able to find anything in what I have on the Osmanian navy losses. Hope you get succesfull.
VBR from Regulus