Life aboard ships 500 years ago was difficult. Sailors slept and lived on the open deck due to lack of space below deck. They typically ate one hot meal per day of salted meat and fish if they were lucky, as fresh food would spoil. Water also became undrinkable after a few weeks at sea. Scurvy, caused by vitamin deficiency, was a common problem for sailors. Crews were divided into watches that worked for 4 hours then rested, and jobs included manning the sails, pumping water from the ship, and looking out from the crow's nest.