Maritime Lines run both the urban and national transport. Marinas also have connections with European ports.
Urban Maritime Transportation runs ships which operate between the following destinations within Istanbul: Kadikoy – Haydarpasa – Karakoy; Eminonu – Uskudar; Eminonu – Kadikoy; Bridge – Yenikoy; Beykoz – Kavaklar; Sirkeci - Bostanci, Bridge – Prince’s Islands; Bridge – Yalova; Kabatas – Cinarcik; Bostanci - Cinarcik.

Boats operate from Istanbul to the following Black Sea towns: Zonguldak, Sinop, Samsun, Giresun, Trabzon, Rize, as well as Izmir. Marmara Lines run to Marmara Island, Bandirma and Mudanya.

Useful contacts:

Port Tel : (+90-212) 245 53 66/249 71 78/249 18 96.
Address: TDY Maritime Lines Agency, Rihtim Cad. Kadikoy, Istanbul
Head Office Tel: (+90-212) 245 53 66/249 71 78/249 18 96.
Reservation Tel: (+90-212) 249 92 22/293 74 54
Information Tel: (+90-212) 244 25 02/244 02 07

Website: http://www.tdi.com.tr/eng/denizyollari.shtml