The USS Enterprise-D visited Starbase 173 shortly after its completion for crew transfers. Among those transferring aboard were Ensigns Sonya Gomez and Dennis Russell, while Ensign Phylo of the Enterprise transferred to the starbase. (SCE eBook: Many Splendors, TNG episode: "Q Who?") A hearing was held aboard Starbase 173 in 2365, at the prompting of Commander Bruce Maddox, to determine the legal status of Lieutenant Commander Data. Ultimately, Captain Louvois agreed with Captain Jean-Luc Picard that Data would be assumed a sentient being. (TNG episode: "The Measure of a Man")