This Navy Grog recipe is a Tiki highball drink with many variations.  Admiral Edward Vernon is the man responsible for diluting the rum ration that was given to the sailors in the British Navy, when he found that the straight rum was contributing to numerous accidents on board. The Admiral was affectionately known by the sailors as ‘Old Grogram’ for the waterproof cloak that he wore. The amount of fruit juice you add to the recipe will depend on how fruity you like your drink.