Deck 2014: Rules of the Road

1. A during the day, three balls in a vertical line
2. B during the day, three shapes, the highest and lowest being  balls and the middle being a diamond
3. C when making way at night, two all-round red lights, sidelights, and a stern light
4. D when making way at night, masthead lights, sidelights, and a stern light

Tip: press A-D to answer