Genghis9
First Officer
United States
Offline
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For IR and VR routes, also known as MTRs, they are managed and scheduled by a nearby military installation, nearby could mean a couple of hundred miles away, read that as those routes are owned by such & such AFB or NAS or MCAS etc. Those bases are responsible for keeping the routes updated through the CHUM system as well as scheduling and therefore deconflicting their use by other flyers wishing to use the route. It's not likely civilian aircraft will fly these routes as a scheduled event, however, the CAP will do so to conduct route surveys etc. Otherwise any military aircraft can schedule the route, assuming the route structure is compatible with the aircraft's performance capabilities i.e. you wont see a C5 flying a route designed for fighter use. The owning base has priority of use, so an F18 field means you'd likely see mostly 18s flying it. Route width can vary from about 4 miles left & right of center, as the typical, to usually not more than 10 miles each side or some variation thereof i.e. 2 miles left and 8 miles right, this info can be found in the DoD's pub AP-1/B for North America. The MTRs are depicted on FAA VFR sectionals, center line only depicted.
The IR routes are established to allow use in IFR conditions, and as such are deconflicted by the regional CTR, while the VR routes are VFR only. Weather conditions and surface factors & terrain (example: noise complaint) determines how low the aircraft will be. All routes are surface to X, but typically tactical aircraft are between 200 & 400 AGL when in clear conditions, while on IR routes they can be at 1000 AGL or higher in IFR conditions; although they can fly lower if able to remain clear of clouds.
Routes are opened at least 15 minutes before scheduled route entry (standard minimum scheduled interval is about 15 mins between flights but can be higher) and they close 30 minutes after or unless center notes a cancelation, a verified exit, or the aircraft abort the route early and notifies center accordingly. Yes, routes have scheduled hours of operation as well as days for use, although most routes can be flown any day of the week and some are 24/7/365. All routes activation should be updated by NOTAM and they are required to be filed by flight plan which notifies center of the route activation, this may not be the case for some VR routes. Although all military flights are required to file an IFR flight plan. For the times they are flying under a VFR flight plan the route use may not be noted until the flight activates it when calling in to flight svc. Meaning all area Flight Service stations should have updates for the routes in their area of responsibility, contacting them can also get you updated info on route activity, just realize they don't know and thus can't tell you IR 200 is going to be used by a flight of 2 F-15Es two weeks from now, only the scheduling agency can do that and they wont tell you that without a need to know, meaning the soonest flight service and the NOTAM system will know is when the flight's flight plan is filed and in the system.
It is wise to avoid these routes mainly M-F day or night and if you are going to be operating near them contact flight service, and yes the local tower should know and in some cases the flights are required to contact the tower near a route for some fields, but not necessarily all, using some established point to ensure they know they are flying by their area. Many general aviation pilots fly in these route areas and seem to be oblivious of military aircraft in their vicinity, very dangerous. |
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