>>11734546>I guess it's because of all the small islands? Maybe? Yes, some inhabited, since military, but all with runways and facilities viable to land and service passenger airliners.
>>11734547Yes. There are various levels of ETOPS ratings expressed in minutes. Flight plans for each flight take those into account when calculating routes and alternative landing sites.
Those apply to single engine failure on a twin jet, if you get a complete power train failure then you're pretty boned in 99% cases no matter where you are. But that's minimized through engineering and procedures to a statistically acceptable (im)probability. Look up Gimli Glider.