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What is an Oroca?
An off-route obstruction clearance altitude (OROCA) is an off-route altitude that provides obstruction clearance with a 1,000-foot buffer in non- mountainous terrain areas and a 2,000-foot buffer in designated mountainous areas within the United States.
Where can you find preferred IFR routes?
“I have found that the easiest and most user-friendly method to find out about preferred routes is to use one of the online flight planning tools such as ForeFlight or FltPlan.com. Either of these tools will display a list of routes that ATC has assigned to aircraft between the two airports requested.
Why do you need a MoCA on GPS?
The MOCA provides “obstacle clearance requirements for the entire route segment,” so if the applicable navigation signal is GPS, and you’re receiving it, then you’ve met the requirements. This is why sometimes you see a MOCA on segments which aren’t within 22 nmi of any VOR.
Are there any changes to the MOCAs system?
Decades long Sustainment only System Designation gave way to increasing sustainment risk and inefficiency. No significant architectural changes in 30+ years No change in basic design No changes in COTS
What is the minimum obstruction clearance altitude ( MOCA )?
MINIMUM OBSTRUCTION CLEARANCE ALTITUDE (MOCA)− The lowest published altitude in effect between radio fixes on VOR airways, off-airway routes, or route segments which meets obstacle clearance requirements for the entire route segment and which assures acceptable navigational signal coverage only within 25 statute (22 nautical) miles of a VOR.
Why is the MEA higher than the MOCA?
MOCAs are determined essentially the same across the board. The question that I think you should ask is why is the MEA higher than the MOCA in some cases where you might not expect it, namely in the case of some GNSS MEAs. Firstly, all MEAs take into account multiple factors, including those described in the following.