Questions about the Functional Block Unit (FGB a Russian acronym), that is the first module of the ISS launched.
The FGB (Known as Zarya) was the first module of the ISS launched. Node 1 (Unity) was attached on a space shuttle mission on the front end, with the Service Module (known as Zvezda) docked to the aft port. There forward element has one addition earth facing docking port, currently occupied by the Rassvet module.
The FGB provided orbital control for the original ISS configuration.