Coat of Arms of the Roman Catholic Military Ordinariate of Canada
Argent a sword Sable between two halves of the cloak (of St. Martin of Tours, the Patron of the Diocese and of Military Chaplains )the cords tasselled, on a chief Gules three maple leaves Or, representing the 3 Services (Navy, Army Air Force) of the Armed Forces.  The Motto - PRAESIDEMUS - means "We Are Watchful";  Unfortunately however, the Mitre and Lappets are not the ones that have been rendered and authorized by the Chief Herald of Canada, in fact... the official Coat of Arms as seen here, is not the one that has been authorized by the Chief Herald's Office as found in the Letters Patent issued by said office.  To view the PROPER Coat of Arms, I suggest you google the Ordinariate itself.  
The following Commons images were used to create this image:

 File:Roman Catholic Diocese of Orlando.svg by Alekjds (talk · contribs)
 File:Sword.svg by Greentubing (talk · contribs)
 File:Coat of arms of the Carabinieri.svg by F l a n k e r (talk · contribs)
 File:Blason ville ca Notre-Dame-du-Mont-Carmel.svg by Ssire (talk · contribs)
 File:Badge of the Blue Mantle Pursuivant.svg by Sodacan (talk · contribs)
Own work, Alekjds, Greentubing, Ssire, F l a n k e r, Sodacan
Ng556