Declination Diagram Tool

[RobBuckhouse]

With the advent of True North arrows in Arc10, a tool for adding a declination diagram would be awesome. Possibly as easy as Insert > Declination Diagram.

For those that don't know, a declination diagram is frequently used in military applications, but is also found elsewhere. It is a graphic representation of the angular differences between True North, Magnetic North, and Grid North.

It looks like this. 

[ChrisMathers]

PLTS could do this and I think I read its going to be part of core in v10.1

[jcokin1]

This idea is similar and should be combined with the following idea already posted on the portal:

North Arrow Enhancment
https://community.esri.com/ideas/2243

[ChrisGranger]

Esri Defense Mapping for ArcGIS Desktop has this capability.