Warframe Wiki is a gold mine in cases like this: https://warframe.fandom.com/wiki/Orbiter "The interior of the player's Orbiter houses various systems called "segments" that act as the main UI for the player to access various important features. When a Tenno first acquires the Liset landing craft, the various ship systems are offline, and have to be restored by collecting segment parts from the Vor's Prize Quest missions. Players can access each segment by walking up to them and interacting. Alternatively, the player can bring up the Main Menu (Esc ) to access each segment quickly without having to move through the ship. Each of the segments can also be upgraded by mounting modules (also called segments) that unlock additional functions or enhances existing capabilities. "