Hey, guess that's my introductory post.
Sorry if something has been already posted since yesterday, but I couldn't sleep and had time to think
I think there is something (important) missing.
I don't think it matters, what kind of propulsion the Adamastor had, or if FDev got it technically correct. As Babylon 5 has already been mentioned, I'll do it as well: The Adamastor is
traveling at the speed of plot.
Let's look at the log. So the Adamastor did travel in three days from Chukchan to the listening post, then in one day from the listening post to coalsack. What matters here is 3 days is longer than one. Why the delay?
There is an entry for the 28.10.3111. The Adamastor did something on the 28th. The entry is missing. Not a crippled message due to the malfunctioning log like from the 29th when having "the object" close or on board, but completely missing. Maybe it was important enough to be deleted before things went from bad to worse.
Now, if I look at the LP Message it isn't an "incomplete snippet from an overheard transmission" like the example LP posted a while ago.
Someone deliberately sent a message to what is presumably a "dead letter box".
I do not think it is just a ciphered message, it looks too structured for that. I think it is a code as in "a set of commands", like navigation data or orders, which need the correct interpreter to read. At most it is a set of commands that was encoded as well.
So, if Azimuth (or whoever has been pulling the strings) wanted to transmit entcrypted data, the top-of-the-line security measures would surely focus on hiding
the key, not the message.
I think, the Amastador did indeed depart with only 370 LY of fuel towards Barnard's Loop from Chukchan. At that time they had
two planned stops: Some yet not known system, and Synuefe XE-Y C17-7 as the final destination. Along the way, they did pick up something, which I assume is more detailed information, more fuel, the mercenaries, and the key to read the LP.
tl;dr:
I think there is some missing hint to be found between Chukchan and Synuefe XE-Y C17-7. With it, the LP message can be read. The LP message also most likely explains, why the Adamastor did not heed straight back to Chuckan (or what the final destination was).