ETOPS (Extended Twin Engine Operations) describes ER
(Extended Range) flights with twin engine aircraft. This applies to flights that are operating over routes that have points further that one hour flying time (one engine, under standard conditions in still air)from an adequate airport
(this can be either over land, water or a combination). The FAA allows max diversion times of 75/120/138/180 and 207 minutes. Basically the difference between suitable and adequate is that a suitable airport has to have weather minimums to land were an adequate airport does not (you can get a more detailed definition by reading FAR
[Edited 2004-04-10 00:22:00]
Please oh please Mr Moderator Nazi, dont delete my thread.