Abstract: A modular seating system including a mounting surface having a plurality of attachment features formed therein and a plurality of chairs. Each chair of the plurality of chairs includes a base including a base body, an interior volume, two lateral openings formed in opposite lateral sides of the base body, the two lateral openings communicating with the interior volume, and a top opening communicating with the interior volume; a connector connected at least in part to a bottom side of the base body; and a seat portion connected to the base body and arranged: to provide a seating surface and to prevent access to the top opening when in the closed position, and to allow access to the top opening when in the open position, each attachment feature configured for receiving the connector of each chair of the plurality of chairs for selectively connecting each chair to the mounting surface.

Abstract: A seating assembly for a watercraft is provided. The watercraft has a deck including deck attachment features provided on an upper surface of the deck. The seating assembly includes: a padded mat for seating a user, the padded mat being configured to abut the upper surface of the deck, the padded mat having a mat attachment feature for selectively connecting the padded mat to the deck by engaging the mat attachment feature with one of the deck attachment features; and a backrest for supporting a back of the user, the backrest having a backrest attachment feature for selectively connecting the backrest to the deck by engaging the backrest attachment feature to an other one of the deck attachment features. The padded mat and the backrest are usable together to allow the user to sit on the padded mat and be supported by the backrest.