| 释义 |
radar required radar requiredA term displayed on charts and approach plates and included in the FDC NOTAMs (flight data center notices to airmen) to alert pilots that segments of either an instrument approach procedure or a route are not navigable because of either the absence or unsuitability of navigational aids (NAVAIDs). The pilot can expect to be provided radar navigational guidance while transiting segments labeled with this term. |