Hull Integrity
Hull Integrity is a feature of every ship and SRV. All ships have a hull percentage. The hull bar is located between the speedometer and Power Distributor pip in the HUD. Every ship ia equipped with a Shield Generator which protects the vessel from physical damage. If the shield is down, the hull will be vulnerable to any external damage. The ship gets destroyed if the hull reaches 0%. You can rebuy a replacement of the ship for credits at a station.
Ships are not invulnerable in Supercruise since overheating can be fatal. Heat accumulates near a star, and by using Frame Shift Drive (SCO). Passengers onboard will send a message to the pilot's Inbox to inform that they are scared and demand the Passenger Carrier to stop.