lets not fall out
guys. please lets not fall out over this. everyone has their opinion on this and this is what i wanted to hear. perhaps it is a bit selfish for someone not to want to pay for extra oxygen - but this is what i am trying to get through to my dad. i am hoping to show him all the replies on this thread to ensure that he does what is neccasary for him to have a safe flight - cost wise irrespective!
many thanks for everyone help on this matter. i am hoping i can get through to my dad to make sure he does things right.