AHL differs from SS in that it's using the Striker style hit/pen/dmg system along with a tweaking action points movement system in contrast to SS which was Book 1 combat on graph paper.
Well, I guess that explains some things. The two copies of AHL at the local game store were pretty beaten up by being opened and reopened over and over again. The manager cobbled a complete copy from the two trashed copies, and sold it to me at a discount.
And when I read the AHL supp … it revisited APs, which I was okay with, but like you say, the movement rules were changed, and I recall one or two other things that made me scratch my head as to why AHL was published. To me Snapshot was a complete Traveller game that even though it repeated a lot of the Traveller game elements in the little green book (I think it had a quick chargen system...something quick and dirty), it added to the basic combat system. With AHL I got a sense that the Snapshot rules were rewritten for the sake of it. I saw no improvement in AP application in AHL over Snapshot, and I've been wanting to say that for thirty plus years now.
It's like you had your choice; basic T combat, Snapshot, and "reworked" allegedly "improved" Snapshot by way of AHL for personal combat. I really shook my head at it. Snapshot may be personal combat on graph paper, but it was functional, and meshed with the basic combat rules from any edition of CT. AHL, in my opinion, didn't.
The hit/penetration thing was needed, but it's like because the LBBs were spacing out tech and rules, I got the same vibe, only more so, and not in a good way, with AHL because of Snapshot. I mean we were already buying the LBBs as they were published, and here's this massive "board game" version of Traveller that has a personal combat rules revision. And you had to buy the whole thing to get the AHL supp. I can't remember using the deckplans for the AHL more than twice in any Traveller session, much less it's version of personal combat.
Just my opinion. But thanks for the reply.