The Dordogne was a favoured commercial route to Bordeaux and the Atlantic coast. Large flat-bottomed boats, called garbariers, well-adapted to the turbulent and dangerous course of the river, carried wood (staves for barrel making, coal, etc.) during the very short flood period, in autumn or spring when the water is referred to as "marketable". The crews of the gabariers then embarked on a dizzying descent, among whirlpools, rapids and rocks.