A starship doesn't regain Hull Points automatically the way a character does by resting and must be actively repaired. It's possible to restore Hull Points to a starship during combat with certain spells (such as
cosmic repairs), with station actions (such as
Jump Start), or station actions granted by upgrades and drones (such as
Repair Hull). Outside of combat, starship repairs are typically handled with the
Emergency Repairs exploration activity; this activity not only restores Hull Points, but is also the primary method of decreasing a starship's wrecked value.