Joshua Blackstone

Lt. Blackstone was Navigator onboard the USS Intrepid (NCC-1738) in the late 23rd century. 

Early life before the Intrepid
Josh was born on June 1,2244 human calendar time on the planet Earth in San Francisco, California.

Chronology

 * 2244: Josh is born on planet Earth in San Francisco, California.
 * 2282: Josh enters Starfleet Academy
 * 2266: Josh graduates Starfleet Academy and promoted to Ensign, his first assignment is the USS Loki as a Navigator.
 * 2268: Josh is promoted to Lieutenant junior grade and is assigned to the USS Polaris as a Navigator.
 * 2270: Josh is promoted to full Lieutenant and is assigned to the USS Intrepid as a Navigator.