For a published procedure, the greater of these two altitudes is the altitude which must be adhered to during that segment, and is called the Minimum Enroute Altitude (MEA). However, on an IFR en route chart, an asterisk appears next to the MOCA if there is also a MRA on that part of the route that uses a significantly higher altitude. One may choose to fly the lower MOCA altitude, but must keep in mind navaid reception is unlikely.