"At 1:20 PM when in position 40.42N;25.56E, a mine was seen floating on the
surface on the starboard bow. The trawler closed slowly, intending to dispose
of it by gunfire when they struck a submerged mine they had not seen."

Source: British Warship Losses in the Ironclad Era 1860-1919, David Hepper

Respectfully,
Joe