Let me remind you that we left the marina near Marmaris on a yacht. And immediately went to Marmaris itself in order to refuel. I live in Kiev and along the Dnieper I have never noticed gas stations, but in Turkey I noticed them. It turns out that they are in many marinas. Refueling is similar to a regular road gas station, but the choice of fuel is smaller and the hoses are longer. Let me remind you that we left the marina near Marmaris on a yacht. And immediately went to Marmaris itself in order to refuel. I live in Kiev and along the Dnieper I have never noticed gas stations, but in Turkey I noticed them. It turns out that they are in many marinas. Refueling is similar to a regular road gas station, but the choice of fuel is smaller and the hoses are longer. In Turkey, your yacht can be refueled with either gasoline or diesel. Our yacht was diesel, so we poured ourselves a diesel. It is cheaper than gasoline :-).
Yacht consumption
By the way, the cost of a yacht is calculated not in distance (kilometers, miles), but in hours. That is, our yacht for example ate 6 liters per hour, when the engine is running at 1000 rpm. Count the flow rate so because there is such a thing as the current and the wind!
Yacht refueling process
The same as the cars, but mooring the yacht to the gas station is harder :-). In general, the mooring process is a nervous thing, it is important not to shake your yacht. Well, then, when you are already moored, tell what fuel to pour you, then go pay and depart. Here are a couple of photos of gas stations in Turkey: 
