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Refer to figure or to STUTTGART (EDDS) SID 10-3D from the Jeppesen GSPRM 2017.
B-RNAV equipment required to follow ETASA 4B:

  • A

    To comply with the minimum climb gradient of 4%.

  • B
    To identify the overhead position at ETASA.
  • C
    To know when to start the turn to KOVAN.
  • D
    For guidance to KOVAN and ETASA.

Refer to figure.
Once you've passed LBU R-238, the use of BRNAV equipment becomes essential for tracking to KOVAN and ETASA, as these waypoints are not defined by RNAV aids.

Basic Area Navigation (B-RNAV) was introduced to enable en-route capacity gains to be achieved with minimal aircraft capability. BRNAV capabilities can be achieved through a combination of the following:

  1. DME/DME
  2. VOR/DME (within a 62 NM VOR range)
  3. INS (with radio updating or limited to 2 hours of use after the last on-ground position update)
  4. GPS (with certain usage limitations)

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