Ensign Navok was a 24th century Vulcan man, a Starfleet officer serving as an engineer aboard the Federation starship USS Aventine in the year 2381. During the Borg Invasion of 2381, Chief Engineer Mikaela Leishman asked Navok to oversee the quantum slipstream drive technology's operating parameters. He reported everything working within tolerances, but noted a difficulty in predicting the phase variances. Earth Starfleet Captain Erika Hernandez suggested that they could control the patterns by emitting soliton pulses ahead of their path, a suggestion that Leishman ordered Navok to work on applying. (ST - Destiny novel: Lost Souls)