Unlike our neighbors to the west, we don't have any helicopters, but we do have two aircraft which mainly cover the north for quick backup, ERT, prisoner transports, supplies, etc. They simply go by the last three of their tail numbers as well. The two aircraft are MPE and MPW. Jay put it in simpler terms than I did as well, AXXX cars here are rural and BXXX are in "town" for places like North Battleford, Yorkton, Swift Current, Fort Qu'Appelle however, I have noticed the same thing as Jay, that in some cases Bravo cars do go a ways out of their "area". An example of this for us was with the flooding in Maple Creek area last week, numerous Bravo cars were brought over from Swift City to assist.