Rum has been associated with the navy and sailors for a long time. It began in 1655 when the British fleet colonised Jamaica. However, the navy were not used to the potent effect of the rum when drunk it large quantities. To combat this issue, Admiral Edward Vernon said that the rum must be rationed (called a tot of rum and was 70ml of rum at 95.5% proof) and also watered down before being served, to help to minimise the effect. This mixing of the rum with water became more commonly known as grog. A more senior officer was able to receive his tot neat and dilute or not as he pleased. This ration would be given to the sailors at midday, daily. The last rum ration however, was on 31^st July 1970 and is now known as Black Tot Day.