A key or a pair of binoculars: https://www.telegraph.co.uk/news/uknews/1561604/Key-that-could-have-saved-the-Titanic.html https://www.telegraph.co.uk/news/ukne

A key or a pair of binoculars: https://www.telegraph.co.uk/news/uknews/1561604/Key-that-could-have-saved-the-Titanic.html https://www.telegraph.co.uk/news/uknews/1561604/Key-that-cou...