William P. Masefield was a human male Starfleet officer, born in 2240, who served during the 23rd century.

William Masefield served in almost every possible capacity in Starfleet, including four years aboard the USS Lexington, beginning just after Commodore Robert Wesley left command. During Masefield's time of service, he has received several minor decorations for accomplishing difficult missions.

Then Lt. Masefield once served a three-year term as Helmsman with then Lt. Cmdr. Niccomachi, but they did not kept close contact since.

Aside from a one-year term of service with Commander Buchwalter and four years with Commander Markova at the Academy, Commodore Masefield did not previously served with any of the Cooper's Crew.

In 2284, Masefield held the rank of commodore and commanded the Baker-class USS Cooper. That year, the Cooper responded to a distress call from Rho Markessis VI with the landing party unexpectedly becoming involved in the planet's civil war.

After the incident on Rho Markessis VI, the Cooper was ordered to Arcanis IV near the Klingon Neutral Zone. (FASA RPG module: Star Trek IV Sourcebook Update). Soon after its arrival, the vessel was diverted to the planet Axanar to search for a hidden Klingon base left over from the Four Years War. (FASA RPG module: Return to Axanar)

USS Cooper personnel
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