As I understand, this forum is not simply about how to bring your PSK in to the airplance, but about how to survive if you will not die during the airplane crash! <img src="images/graemlins/smirk.gif" alt="" /> Well (in my humble opinion), if you manage to survive airplane crash (as Polak187 said, we have very small chance of surviving the real crash), then there should be also a few other survivors who will survive it too, shouldn’t be? Even if you have your PSK, you will have to share it with other people, and I do not think it would satisfy needs of all survived passengers, because there are not many people who carry PSKs. <img src="images/graemlins/frown.gif" alt="" />Therefore, I do not think PSK will considerably improve your chances of survival and you will still not be able to sustain long period. Also, in some countries rescue missions may be delayed simply because of speculations that you did not survive, should be already dead, or simply cannot find you. <img src="images/graemlins/frown.gif" alt="" />So, you will need to ask for help and ask it quickly (if airplane already did not send its coordinates after crashing). Therefore the best option, to my opinion, is to keep GPS and satellite phone with yourself on the airplane and all the rest put in luggage. Also, GPS and satellite phone will help you more than knives and guns if you travel abroad, because in some countries you can be regularly searched by police that you will prefer not to have even a pen knife in your pocket to reduce possible troubles with police ( this is usually practised in countries with high crime rate, especially of former USSR) <img src="images/graemlins/frown.gif" alt="" /> . In case of danger you can use satellite phone to call for help. I do not think you should take the risk to bring in a prohibited item into the cabin of an airplane, especially when you have higher chance to be caught than to use it . What do you think?
Regards,