Transmission and utility lines often span approaches to runways, natural flyways, such as lakes, rivers, gorges, and canyons, and cross other landmarks pilots frequently follow, such as highway, railroad tracks, etc. RF turn capability is optional in RNP APCH eligibility. Although the appropriate response will vary with the situation, in general pilots should: Use the last reliable navigation information as the basis for initial headings, and climb above terrain, Change to another source of navigation, if available (i.e., VOR, DME radar vectors), Pilots should promptly notify ATC if they experience GPS anomalies. Other methods providing an equivalent level of performance may also be acceptable, For procedures or routes requiring the use of GPS, if the navigation system does not automatically alert the flight crew of a loss of GPS, the operator must develop procedures to verify correct GPS operation, RNAV terminal procedures (DP and STAR) may be amended by ATC issuing radar vectors and/or clearances direct to a waypoint. Considerations for selection of either are: Are they small enough to be considered a "point? RNP APCH has a lateral accuracy value of 1 in the terminal and missed approach segments and essentially scales to RNP 0.3 (or 40 meters with SBAS) in the final approach. For example, "N1234, failure of GPS system, unable RNAV, request amended clearance", Pilots are not authorized to fly a published RNAV or RNP procedure (instrument approach, departure, or arrival procedure) unless it is retrievable by the procedure name from the current aircraft navigation database and conforms to the charted procedure. Supporting structures such as guy wires exist here as well, Some locations identify these obstructions with unique sequencing flashing white strobe light systems, However, many power lines do not require notice to the FAA and, therefore, are not marked and/or lighted, Many of those that do require notice do not exceed 200 feet AGL or meet the Obstruction Standard of 14 CFR Part 77 and, therefore, are not marked and/or lighted, Pilots are cautioned to remain extremely vigilant, especially in the case of seaplane and/or float-equipped aircraft, The majority of unmanned free balloons currently being operated have, extending below them, either a suspension device to which the payload or instrument package is attached or a trailing wire antenna, or both, Good judgment on the part of the pilot dictates that aircraft should remain well clear of all unmanned free balloons and flight below them should be avoided at all times, Pilots are urged to report any unmanned free balloons sighted to the nearest FAA ground facility with which communication is established to assist FAA ATC facilities in identifying and flight following unmanned free balloons operating in the airspace. Copyright 2023 CFI Notebook, All rights reserved. The use of an automatic or manual runway update is an acceptable means of compliance with this requirement.
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