T'Pol is the first Vulcan officer to serve a prolonged term on a human vessel. T'Pol served aboard the Enterprise for 10 years (2151–2161). To compare, the previous record was just 10 days. As a sub-commander serving the Vulcan High Command, she was stationed aboard the Enterprise in April 2151, as an observer to Captain Jonathan Archer and his crew, who the High Command insisted, were not ready for interstellar space exploration. After the success of the Enterprises initial mission led to the vessel being given an extended exploration mandate, T'Pol requested to stay aboard.
