How is MOCA identified on a low enroute chart?

MOCA, or Minimum Obstruction Clearance Altitude, is a crucial safety reference used by pilots during enroute flight. On low enroute charts, it is specifically identified with a "T" placed directly under the MEA, or Minimum Enroute Altitude. The presence of this "T" symbol indicates to pilots that the altitude provides a guaranteed obstacle clearance along with the assurance of navigational signal coverage for the specific route segment.

This indication is essential for flight planning and operational safety, as it guides pilots to maintain a safe altitude that ensures clearance from terrain and obstacles while navigating. It essentially serves as a reminder to pilots that the altitude engages both obstacle clearance criteria and the availability of air traffic control services, which is especially important in mountainous or congested areas.

Other options would not provide the necessary identification or clarification of MOCA on low enroute charts, since the "T" symbol is specifically used for this purpose.