8 oz of Gosling's Black Seal rum (or Dark rum)
6 dash of Angostura bitters
5 oz of Pineapple Juice
5 oz of Orange Juice
crushed ice (or ice)
2 oz of grenadine syrup
Stir or shake vigorously until a frothing head appears. Strain into sour glasses. Garnish with a slice of orange or a Maraschino Cherry.