As the Mandalorian launches the attack upon a hovering Corsair, pirate king Gorian Shard gives the order to "man the gunwales". This prompts the pirate bombardiers to jump down to the lowest deck and begin firing gun turrets mounted to the underside of the spaceship. However, the nautical term 'gunwale' does not refer to an actual gun, since a gunwale is the upper edge of a ship's hull. Although a gunwale could be used to mount a gun, it's also leaned upon by passengers to admire an ocean view.
When the citizens of Nevarro are cheering, the alien boy of the Melitto species is punching his arm in the air, revealing ordinary human skin.