Self-propelled barge

A self-propelled barge appears travelling south-west through the Leonida Keys in the first Grand Theft Auto VI trailer, at 0:35. Its broad, flat deck follows the form of a conventional deck barge.

Another barge is visible near the beginning of the second trailer, at 0:12. The vessel has its own propulsion and a small cabin positioned at the front.

Two self-propelled barges also appear in an official screenshot of the Leonida Keys. Both are shown on the waterways of the island region.