The Type 9 shuttlecraft, also called a Class 2 shuttle, was a small streamlined Starfleet shuttle of the 2370s, carried in numbers by USS Voyager and frequently lost in the Delta Quadrant.
The Type 9 is the low, wedge-shaped shuttle seen through most of Star Trek: Voyager. It is introduced in Threshold, in which Tom Paris flies the specially modified shuttlecraft Cochrane past the transwarp barrier, and thereafter serves as the ship's standard small craft.
The shuttle seats a pilot and one or two passengers in a cramped cabin with a small aft compartment. On screen the crew usually call it a Class 2 shuttle. Its limits are a running theme: Paris complains in Extreme Risk that the design is too slow and too fragile for the work Voyager needs, which is the argument for building the Delta Flyer.
A good many are destroyed or abandoned over the seven years of the journey, and Voyager's engineers are understood to build replacements.