From UFStarfleet Wiki
A “Seed Ship” is a potential ship of the line within UF Starfleet.
This program is specially designed to help develop potential 'ships of the line' by offering a basic training program to UFS members who may not currently have the qualifications to apply for a Shakedown Cruise. It is hoped by reducing the requirements and offering vibrant, active training and support as well as consistent mentorship, 'seed ships' will obtain a solid foundation of education and experience, blossoming into fully fledged ships of the line in time.
For more information, please review the SASP Participant Guide