Hey there, that triumph requires you to have 'assigned <the character/s as> your First Mate', before it starts counting.
The option to assign this is a later upgrade on each row of the Star Chart. Due to the limited number of Repute available so far, I don't believe you could have unlocked one of those upgrades yet. So at the moment there is no way to progress that triumph.
English
-
[quote]that triumph requires you to have 'assigned <the character/s as> your First Mate', before it starts counting.[/quote] A particular detail I had missed. Thank you.