Wireless `N' section

[John Sliz]

In Jean Bouchery's book on the Cdn. Soldier, he has the breakdown of a Signals group. It goes from A to M in the listing of sections and goes into detail of each. Great!
Of course, I come across a `N' section attached to a Fd. Coy., RCE. This document is in the Standing Orders for a Fd. Coy, RCE.
It consisted of one vehicle and 3 RCCS personel. Is there an expert on the Signal Corps out there? Could the `N' just be a typo and it should really be `M'?
Thanks!
John