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Hey all. Just running into the unit coherency rules in 9ed for the first time... So, "2" horizontally and 5" vertically." I am having a hard time interpreting this... If models have no horizontal distance, can they have up to 5" vertical distance?
For example:

+--+
----
----
+--+
ooo-
ooo-
ooo-
ooo-
ooo-
ooo+--+
ooo ----
ooo ----
ooo+--+
oooooo-
oooooo-
oooooo-
oooooo-
oooooo-
oooooo+--+
oooooo ----
oooooo ----
oooooo+--+


In this case, the plusses are units, the dashes are an inch of space and the o's would just be spaces but DakkaDakka doesn't want to remember the spaces beside the dashes. The models are all forward-facing. Each model is 2" away or 5" away from another model and close to at least two other models. Anyone within 5" vertically has no horizontal distance from that model so there is no 'if withon 5" vertically then not within 2" horizontally" conditions. So is this a plausible formation for a 12 man unit?

Ah yes my problem is I am thinking about the vertical axis on 2 dimensions from a birdseye view and interpreting the z axis to indicate height, when the vertical axis is indicating height and the horizontal axis is actually a flat x-y axis circle in the spirit of the rules.

5" Vertically means a model can be directly above another model, but the base of model A must be within 5" of the base of model B since all measurements are from the base. So within 5" on the Y-axis.

2" Horizontally means the model must be within 2" across from another model, as measured base to base. So within 2" on the X-axis.

Both of these must be true for a model to be in coherency with another model. So you are looking at a cylinder around a model's base to determine when another model is in coherency with it.

Your model is in coherency if it's within 2" horizontally and 5" vertically, you can measure both.
One way to think about it is a cylinder around the model, extending 5" above and below the model in height and 2" radius around the model in width. Any model touching that cylinder is close enough.
Another way to think about it is you can draw a diagonal line between the two models, which describes a righth-angled triangle with 2" horizontal and 5" vertical sides.

So your example would be in coherency.

It's measured Base to base? That means I've been doing it wrong. I just measured headish to baseish....The mdels are within 5" vertically. I didn't know it had to be base to base...

Thank you.

FezzikDaBullgryn wrote:
It's measured Base to base? That means I've been doing it wrong. I just measured headish to baseish....The mdels are within 5" vertically. I didn't know it had to be base to base...

Thank you.

Everything is base to base unless the model doesn't have a base, I believe.

Yes, measuring is base to base, this was from the beginning of 8th, thats where i started 40k. Dunno how it was earlier.

Thank you for correcting my horrific mistake.

FezzikDaBullgryn wrote:
It's measured Base to base? That means I've been doing it wrong. I just measured headish to baseish....The mdels are within 5" vertically. I didn't know it had to be base to base...

Thank you.

I never picked up on that (came back from 6th). Given the models are roughly 2" tall, this makes sense as it nets out to roughly 2" apart in any direction.


To be honest, I (personally) was always pretty lenient on this rule (vertical coherency). As long as the unit was in the building and relatively close, I never really bothered to measure vertically. But