Striker George Newell has joined Marine on loan until 6 January.
George has made two league appearances from the bench for Southport. He made his debut, coming on as a sub, against Scarborough in the FA Cup and scored with his second touch.
He then picked up a bad injury in the game against Brackley in mid October and has been out of action since then.
The 22-year-old, who played last season in Scotland with Motherwell and Albion Rovers, will join the BetVictor Division One North West side in order to gain game-time.