Unit of liquid capacity, the value of which depends on the liquid being measured. It is used for petroleum, a barrel of which contains 159 litres/35 imperial gallons; a barrel of alcohol contains 189 litres/41.5 imperial gallons.
The flag's unusual 3:4 proportions are laid down by law. Green represents the forests. Blue symbolizes the Atlantic Ocean. Effective date: 9 August 1960.