“Now I come to the aforementioned experiment (sometimes interpreted as an early concept related to submarine principles), demonstrated at Toledo by two Greeks, who, having obtained a large cauldron, with its opening turned downward, and hanging in the air by ropes, fasten a plank and boards in the middle of the hollow of the cauldron, …”
Opusculum perpetua memoria dignissimum, de natura magnetis et eius effectibus
Jean Taisnier
Some say that McCartney got the idea of a yellow submarine from his 1963 holiday in Greece, where he had enjoyed an iced spoon sweet that was known locally as a submarine.
A modern submarine can stay underwater for months.
They detected the enemy submarine on the radar.
The submarine disappeared beneath the waves.
"Dive, dive, dive" screamed the captain of the submarine
The submarine launched a torpedo towards the enemy target
