Worth mentioning that harbour signal lights are not the same the world over https://history.stackexchange.com/questions/69030/why-does-the-us-use-the-opposite-

Worth mentioning that harbour signal lights are not the same the world over https://history.stackexchange.com/questions/69030/why-does-the-us-use-the-opposite-convention-to-the-rest-of-the-world-for-colour https://history.stackexchange.com/questions/69030/why-does-t...