Scunthorpe took the lead after just three minutes when Adam Boyes capitalised on a defensive mistake, but Alan Connell levelled the score when he turned the ball home from close range.
An inexperienced Iron side struggled to create chances, with the visiting keeper rarely tested. Trialist Trent McClenahan played at right-back, but had a quiet game
The Mariners named a stronger team, including former Iron left-back Lee Ridley, and had the better goalscoring opportunities.
The visiting players' shooting did not improve in the shootout, with Dwayne Samuels firing well over and Ridley seeing his shot come back off the crossbar to hand the title to the Iron.
Andrew Wright, Michael Collins, Rory Coleman and Matt Godden all scored in the shootout.
Scunthorpe took the lead after just three minutes when Adam Boyes capitalised on a defensive mistake, but Michael Leary levelled the score when he turned the ball home from close range.
An inexperienced Iron side struggled to create chances, with the visiting keeper rarely tested. Trialist Trent McClenahan played at right-back, but had a quiet game.
The Mariners named a stronger team, including former Iron left-back Lee Ridley, and had the better goalscoring opportunities.
The visiting players' shooting did not improve in the shootout, with Dwayne Samuels firing well over and Ridley seeing his shot come back off the crossbar to hand the title to the Iron.
Andrew Wright, Michael Collins, Rory Coleman and Matt Godden all scored in the shootout.