Drifting?
 

Are we drifting based on the wind/waves/current in the game? Is it modeled.

When my speed is completely to zero and I am watching on the map my ship/symbology, it seems it doesn't move. May be I was not a scale small enough at that time??

Thanks

I think it depends on the weather within your current spot on the map,not the winds like in real-life.Sometimes you just stay in one place not moving at all and sometimes in stormy weather you can catch quite some speed on the waves

Maybe somebody here knows for sure, but I do not think this occurs or is modeled in the game - I've sat submerged next to a stationary/sinking merchant for several hours (game time) waiting to see if it would sink, and neither of us appears to have moved at all - I suppose this could mean that we're both drifting at exactly the same speed, but it seems hard to believe that would be the case given that it's (mostly) up on top (where it would presumably be affected by winds etc.) and I'm completely down below.

YES, there seems to be drifting.

Take out the ruler and plot a targets course.

Now try postioning your sub ahead of time for a 90* AOB bow at close range (400 meters).

You will sometimes notice that you will drift off that mark. You don't notice any drift next to another ship because it is drifting with you. Currents are not THAT localized to be confined to only in the first 1-2 meters of water depth.

In any case, the ship you torpedoed will almost always have a greater than or equal draft as it starts flooding and taking on water.

I noticed drifting - well I assume thats what it was - when I added ships to ports
If I didnt make them docked when I visited the port they had moved from where I had placed them
The docked ones were still in the same place I had put them

yes!!