Thanks for a good app Unfortunately on high res screen, the flashing dot is so small, it is impossible to see against the background "Light" in the lighthouse.
Added lateral, safe water and isolated danger buoys.
Code re-factoring + back button now also returns from the graphical representation view.
Buoys is an efficient and amusing way to test your skills in recognizing buoys.
Signal Flags is an efficient way to test your skills in recognizing flags.