Originally Posted by
Mr Optimistic
On another issue would the a/c have been visible to Vietnam ATC at the time of last voice message.
And finally, following normal protocol, when would first voice contact have been expected with Viet ATC in relation to the time of the OK roger message?
Not sure about your second, but you can read some of LukeSkyToddler's posts in this thread regarding when Vietnam ATC was trying to make contact with MH370. Search of this thread by his user name should get you to the posts in question.
EDIT:
?? Just did a search, and find that I cannot dig up any of his posts. He made quite a few about hearing Vietnam ATC calling for and getting no response from MH370, as he was in the air and on that freq at the time.
Don't know what to make of this.