OV-165 was an orbital vehicle, a type of space shuttle, used by the inhabitants of Earth in the first half of the 21st century. (Star Trek: Enterprise title sequence)
This ship was seen in the opening titles of
Star Trek: Enterprise as Linda Park's credit plays, right after the International Space Station (a 1990s concept), and prior to a scene of the Phoenix in 2063. While no name or agency's logo were seen on the ship, the number follows the registry system used by NASA for the modern day space shuttle orbiters used by the United States of America, a system that began with
Challenger OV-099 and Enterprise OV-101.
A Startrek.com feature on the sequence described it as a " hypersonic spaceplane". [X]wbm