The new marina on the SE side of the harbour is now built. See the attached two photos. The jetties are concrete on piles, with vertical rubber fenders, plastic faced, suitable for (fishing boats) with gunwhales or rubbing strakes. Utility pods everywhere, not yet connected. Depths vary - we found 2m N approaching the third jetty from the entrance, but 2.3m alongside it. The second jetty is deeper.
We found min depth in harbour entrance 3.7m, as on current Navionics. That was on the leading line as per Pilot which shows 5m.
In Sep we found oodles of space, sheltering for four days from a stiff NEly. No swell through the entrance, but quite a chop in the large harbour, with breakers over-topping the W mole. Regular buses to Istanbul, 1 1/2 to 2 1/2 hrs depending on traffic.