Sighting Task Check DRM for rooftop

jrv

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B23.8 "Rooftops are treated the same as another building floor level at the next higher half-level elevation except as amended below."

This would seem to indicate that the Sighting TC DRM is +3. In light of the rooftop's behavior for TEM, concealment, FFMO, rout & interdiction, this doesn't feel right.

JR
 

mgmasl

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About rooftop also... Are concealed units in rooftop automatically revealed when in LOS of a unit at same/higher level? or are they considered in Open Ground for concealment loss? ie they maintain concealment until doing any concealment loss activity..
 

Binchois

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I think JR's suspicions are correct - that the Sighting TC mod should be +0 vs. units on a rooftop. The problem is probably just semantics as the "SIGHTING TC DRM" table states:

+3 Target is in building/woods/rubble/orchard (in season)

Units on rooftops are not IN the building. A rule from Red Barricades supports us regarding "roofless factories:"

O5.47 AERIAL: The Sighting TC E7.3) DRM vs a unit in a Roofless Factory Hex is always + 2, not + 3.

This makes sense - a roofless factory can be seen into by aircraft, but still provides some places to hide - much moreso than a rooftop!

And as JR says, it seems odd to use +3 since a rooftop counts as OG for FFMO, rout & interdiction to give it a +3 mod just for sighting. I think a RB update should simply add a passage like O5.47 to section B23.8

As for mgmasl's concealment question, I believe that the rules are describing a special case for rooftops. That concealment is lost immediately if a GO enemy unit (within 16 hexes) gains LOS to it from the same or higher level:

B23.82 CONCEALMENT: A Rooftop Location is Concealment Terrain only for setup purposes. A unit can remain hidden or concealed on a rooftop only if there are no Good Order enemy ground units within 16 hexes of it that are at the same or higher level with a LOS to it; these same restrictions apply to gaining "?" on a rooftop [EXC: the enemy units need only be unbroken (as opposed to Good Order) to prohibit such gain].
In short, rooftops are depicted as especially visible and vulnerable to an enemy that is at an equal or higher level.
 
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jrv

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About rooftop also... Are concealed units in rooftop automatically revealed when in LOS of a unit at same/higher level? or are they considered in Open Ground for concealment loss? ie they maintain concealment until doing any concealment loss activity..
B23.82 "A unit can remain hidden or concealed on a rooftop only if there are no Good Order enemy ground units within 16 hexes of it that are the same or higher level with a LOS to it." A HIP/concealed unit would be fully revealed as soon as there is a Good Order enemy ground unit within 16 hexes at the same level or higher with a LOS to it.

JR
 
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