(to je ale sektorova vyska, plati v celem ctverci  )
Altitude Restrictions:
Pilots navigating on, or navigating a published route inbound to, a STAR procedures must maintain last assigned altitude until receiving authorization to descend so as to comply with all published/issued restrictions
This authorization will contain the phraseology DESCEND VIA. If vectored or cleared to deviate off a STAR, pilots must consider the STAR canceled, unless the controller adds expect to resume STAR; pilots should then be prepared to rejoin the STAR at a subsequent fix or procedure leg. If a descent clearance has been received that included a crossing restriction, pilots should expect the controller to issue an altitude to maintain. If the STAR contains published altitude and/or speed restrictions, those restrictions are canceled and pilots will receive an altitude to maintain and, if necessary, a speed
The phrase: Descend VIA authorizes the pilot to:
Descend at pilot's discretion to meet published restrictions and laterally navigate on a STAR
When cleared to a waypoint depicted on a STAR, to descend from a previously assigned altitude at pilot's discretion to the altitude depicted at that waypoint, and;
Once established on the depicted arrival, to descend and to meet all published or assigned altitude and/or speed restrictions
When otherwise cleared along a route or procedure that contains published speed restrictions, the pilot must comply with those speed restrictions independent of any descend via clearance
ATC anticipates pilots will begin adjusting speed the minimum distance necessary prior to a published speed restriction so as to cross the waypoint/fix at the published speed. Once at the published speed, ATC expects pilots will maintain the published speed until additional adjustment is required to comply with further published or ATC assigned speed restrictions or as required to ensure compliance with 14 CFR Section 91.117
The descend via is used in conjunction with STARs to reduce phraseology by not requiring the controller to restate the altitude at the next waypoint/fix to which the pilot has been cleared
Air traffic will assign an altitude to cross the waypoint/fix, if no altitude is depicted at the waypoint/fix, for aircraft on a direct routing to a STAR
Air traffic must ensure obstacle clearance when issuing a descend via instruction to the pilot
Minimum en route altitudes (MEA) are not considered restrictions; however, pilots must remain above all MEAs, unless receiving an ATC instruction to descend below the MEA |
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