A device for covering at least part of a container using a tarpaulin, comprising: a rod for rolling the tarpaulin thereonto and unrolling of the tarpaulin therefrom; a support arm mountable to the container for rotatably supporting the rod, the support arm being pivotally movable relative to the container; a rod actuator for selectively rotating the rod; and an arm biasing element for biasing the support arm towards a predetermined position. Rotating the rod using the rod actuator to roll the tarpaulin therearound moves the support arm towards a support arm first position to move the tarpaulin to a tarpaulin retracted configuration and rotating the rod using the rod actuator to unroll the tarpaulin therefrom moves the support arm towards a support arm second position to move the tarpaulin to a tarpaulin extended configuration.