trailrunner
Senior Member
Hello all,
In my quest to move from SK to full ASL, I'm trying to understand LOS around hills. This seems like a fundamental concept, so I want to get a solid understanding.
I'll quote rule 10.2 in its entirety:
2) In the second sentence, I’m having trouble understanding “…traces its LOS through a Crest Line as it leaves its hex…” What does “as it leaves its hex” mean? Where does it have to cross the Crest Line to qualify as “leav[ing] its hex.” A literal interpretation of this is that the Crest Line would have to be coincident with the hexside, but I’m sure this isn’t the intent. Does the Crest Line therefore have to be in the unit’s hex? I don’t think so, because in that case, the wording would be “traces its LOS through a Crest Line before it leaves its hex.” Does the Crest Line have to be in the next, adjacent hex? I don’t think so, because in that case, the wording would be “traces its LOS through a Crest Line in the first, adjacent hex after leaving the unit’s hex.” So what does “as it leaves its hex” mean?
3) In the first example, why doesn’t the unit in Y4 have LOS to AA3, if it has LOS to Z2? What is the difference in these two cases? I’m assuming that the road does not matter.
Thanks very much in advance.
In my quest to move from SK to full ASL, I'm trying to understand LOS around hills. This seems like a fundamental concept, so I want to get a solid understanding.
I'll quote rule 10.2 in its entirety:
1) In the first sentence, why does it say “…into only the initial Crest Line hexside….” and not “hex”? Is a “Crest Line hexside” any hexside of a hex containing a Crest Line? This may seem like I’m splitting hairs, but I think this applies to the second example: Say the darkest brown in hexes H7 and I8 did not extend to the center dot of these two hexes — say it just extended about a quarter of the way from I7 into H7 and I8. Would the unit in F9 still have LOS to H7 and I8? Or would the first hex at the dark brown level that it would have LOS to be I7?10.2 DIFFERENT LEVEL LOS: A lower level unit may trace a LOS into only the initial Crest Line hexside of each level above it. Likewise, a unit may trace a LOS to a lower level only if the higher unit traces its LOS through a Crest Line as it leaves its hex and this LOS never recrosses another Crest Line of the same or higher elevation [EXC: A unit may always trace a LOS through a Crest Line in an adjacent hex of lower elevation (15Y4 can fire through Y3 to Y2 and along the Y3-Z3 hex side to Z2 but i cannon fire through Z3 to AA3)]. Even if a LOS survives this test it can still be blocked by other requirmentents such as 10.23.]
2) In the second sentence, I’m having trouble understanding “…traces its LOS through a Crest Line as it leaves its hex…” What does “as it leaves its hex” mean? Where does it have to cross the Crest Line to qualify as “leav[ing] its hex.” A literal interpretation of this is that the Crest Line would have to be coincident with the hexside, but I’m sure this isn’t the intent. Does the Crest Line therefore have to be in the unit’s hex? I don’t think so, because in that case, the wording would be “traces its LOS through a Crest Line before it leaves its hex.” Does the Crest Line have to be in the next, adjacent hex? I don’t think so, because in that case, the wording would be “traces its LOS through a Crest Line in the first, adjacent hex after leaving the unit’s hex.” So what does “as it leaves its hex” mean?
3) In the first example, why doesn’t the unit in Y4 have LOS to AA3, if it has LOS to Z2? What is the difference in these two cases? I’m assuming that the road does not matter.
Thanks very much in advance.