This version is my another attempt to minimize the annoying effect of the 'Light on deck' calls.
The program now checks the lights and gives the warning every 20 seconds 1) no more than 3 times and 2) only after you landed on deck. This means if your mission starts on the deck, you won't hear these calls.
The setup option introduced in the 0.8.2.10 beta is still valid. Maybe I'll remove it in the future...