This Star Trek papercraft is a Aquashuttle, based on the Star Trek film series, the paper model is created by MTK. The Aquashuttle was a type of Federation shuttle stowed aboard the shuttlebay of Constitution-class vessels during the late 2260s.
Aquashuttles were multipurpose vessels that were designed for traveling through space; through a planetary atmosphere; transporting across water, like a boat; and as well, were submersible, like a submarine. These vessels were also lightly armed with dual forward phaser emitters, as well as an aft emitter.
You can download this Star Trek spaceship paper model here: Star Trek - TNG Era Aquashuttle Free Papercraft Download