ICAO Operations Panel RNAV / Ground-based Charting Symbol Hierarchy - PowerPoint PPT Presentation

ICAO Operations Panel RNAV / Ground-based Charting Symbol Hierarchy

OVERVIEW • NEED FOR CHARTING SYMBOL HIERARCHY • HISTORY OF U.S. DEVELOPMENT EFFORTS • CURRENT U.S. CHARTING HIERARCHY • ICAO PANEL COORDINATION TO DATE • DISCUSSION

NEED FOR CHARTING SYMBOL HIERARCHY • Uses standard symbols on all charts to distinguish fixes originally defined using ground-based NAVAIDs • Harmonizes paper chart and electronic symbols • Shows non-RNAV capable aircraft the fixes they can define with ground-based NAVAIDs • Provides greater utility and flexibility for Air Traffic Control, especially in the enroute environment

HISTORY of U.S. DEVELOPMENT EFFORTS • Aeronautical Charting Forum (RNAV Transition Group) began study in 2001 • ALPA, FedEx pilot unions endorse new chart symbols • RNAV Transition Group presents Charting Hierarchy to Aeronautical Charting Forum (2002) • U.S. government and industry charting agencies adopt symbology on charts in (month? 2002?)

Current U.S. Charting Hierarchy • Triangle = Fix • NAVAID = NAVAID symbol • 4-pointed STAR = RNAV waypoint • Open = “on request” reporting point • Filled = “compulsory” reporting point • Circle = Fly-over • No circle = Fly-by • No nested symbols (unlike current use in Annex 4)

Example Departure Chart (U.S.)

Same Example Chart (Annex 4)

ICAO Panel Coordination • Working paper presented to OCP and discussed extensively – OCP-13 recommended review by multidisciplinary group • ANC agreed and Secretariat referred paper to AISMAPSG • Working paper presented to AISMAPSG – AISMAPSG did not review in detail because it felt OPSP should review first and make recommendation • Working paper prepared for OPSP WHL-3

DISCUSSION • Working paper recommends changes to Annex 4 for enroute and instrument procedure chart symbols • Paper also recommends use of hierarchy to identify ground-based fixes and NAVAIDs without use of waypoint symbol • OCP and AISMAPSG awaiting recommendation of OPSP on use of charting hierarchy

ICAO Operations Panel RNAV / Ground-based Charting Symbol Hierarchy

Recommended Electronic Symbols • Society of Automotive Engineers (SAE ARP 5289) recommended electronic symbols: – Triangle for an intersection – Four-pointed star for a waypoint – No specific symbol for “reporting point.” • RTCA SC-181 adopted SAE electronic symbol set for inclusion in DO 257