Submarine Peculiar Special & Support Equipment (PSSE) Support, PSSE Program Management, Non-Ordnance Handling, Virginia Class Weapons Cradle Warehouse. NOTE: The Government is seeking responses from s... Submarine Peculiar Special & Support Equipment (PSSE) Support, PSSE Program Management, Non-Ordnance Handling, Virginia Class Weapons Cradle Warehouse. NOTE: The Government is seeking responses from sources who currently hold a Seaport-NxG Mulitple Award Contract (MAC). Respondents should indicate their current Seaport-NxG contract number as part of their submission.