The basic idea of the new SRTP is limiting of the need for evacuation because of the risks involved. The vessel is divided into a number of watertight compartments for continued functionality in case of accidents.
Safe Return To Port is a safety system that will probably never be used, or be used only in the course of emergency exercises.
In modern ships, the engine rooms are isolated using watertight doors. The engine room of Megastar is additionally divided into two separate watertight compartments; if one should be damaged, the other will remain operational. The same principle applies to critical control and safety systems. A SRTP vessel can cope for 12 hours even if severely damaged, providing the passengers with basic foodstuffs and hygiene services.