I have purchased Naval Battles Simulator recently and it is worth buying it.
(you can find my review on Steam)
It is a good game (for a good price), definitely recommend to anyone interested in naval battles and serious strategy games.
The game has hours of gameplay and many features.
So far I have played battles and campaign mode.
(I will try the Shipyard soon)
I did not have any problems with a screen resolution, I knew that Java is needed, the game did not crash.
(mention that in response to negative Steam reviews)
I love the after battles reports, full of statistics and detailed information.
The timeline/curtain (in Campaign mode) is very interesting too.
(You can untick "Show curtain" in the Campaign option so you do not need to drag it up during a game.)
I have spent an hour reading letters, historical info, battle reports, and listening to radio broadcasting.
I have exchanged a few emails with Michal (the game creator) and I think we should support this indie project.
The price is just the right price to help him keep going with a great product.
I know the game is not polished yet but he works on the project and more improvements are coming soon.
The game is a remake of the Great Naval Battles game.
Comparing it to Rule the Waves is not correct.