08-Jun-2012 -- While on vacation in Istanbul, we took a public ferry to the scenic "Princes' Islands", in the Sea of Marmara, south of central İstanbul. Coincidentally, an offshore degree confluence point lies close to the ferry route, so I was curious to find out how close the ferry would come to the point. Would it get within the 100 meters required for a successful visit?
Alas, the ferry did not get close enough for a successful visit. On the outbound leg (southbound, towards the Princes' Islands), the ferry veered eastward to make a stop at Kadıköy, on the Asian side of İstanbul. In doing so, it passed 750 meters east of the confluence point.
On the return leg (northbound), our ferry did not make a stop at Kadıköy, and so got a little closer to the confluence point - this time passing 309 meters to the east.