4 is the same as 3 in this regard as Jeff mentions, astvitaliy1982. You will notice though, with the "sounding" of the depth, seemingly a "variability" is added in. You do one sounding and get 13.8m, while the next is 14.2m, and the next 14.7, then back to 13.8. The depth seems to be centered on a figure, such as 15m, but will vary as you travel through the 'terrain'. If you reverse and did the same exact course, and were able to do a sounding at the exact same locations, I don't think you will find the same depth. What they should have done in the game, is have a "0" (zero) depth, as well as a -2m depth, such that you could have "shoals", with waves washing over them. Who needs a 2000m depth, when the crush depth of the sub is less than half of that? That way, you would potentially see more variability in the shallows. But what else would have been nice to have is low and high tides...
- a skipper would have to really pay close attention to their route as they travel in the South China Sea, or in your case, certain areas of the Baltic while enroute to the North Sea...
- I'll be willing to bet that the devs did what they did, so that the player would have to really work at running aground... lol