The son of former West Ham United, Southampton, Blackburn Rovers and Lens midfielder Robbie Slater has been snapped up by the Mariners and is looking to force his way into Graham Arnold's first team immediately.
"Hopefully if I train well I'll get a shot," Slater said. "I can see that he's (Arnold) done that with young players before."
Arnold added: "Obviously Tom is the son of Robbie Slater, who is my good mate. I went and watched Tom on numerous occasions without his father around to make sure he has the qualities, and he does have the qualities."