...it's entirely possible that Hebert was aware of/notified of Peregrine's arrival. If he's anxious, I suppose he can go to the ship, request permission to board, and then report to his Chief FCO.
Alternately, he could have already been waiting when Peregrine arrived and, maybe, strikes up a conversation with a crew member who's dis
embarking before going all "official" as above.
Wide range of possibilities.