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NAV, TAWS & Vision-1 Database Calendars

Comprehensive tracking of aviation database cycles including Navigation (NAV), Terrain Awareness and Warning System (TAWS), and Vision-1 databases. Stay compliant with AIRAC cycles and ensure your aircraft systems operate with current data.


Understanding Database Cycles

Aviation databases follow the AIRAC (Aeronautical Information Regulation and Control) 28-day cycle. Each cycle has an Issue Date (when data becomes available) and an Effective Date (when it must be used). The current active cycle is highlighted in green, available-for-download cycles in blue, and future cycles in grey.

Current Date: 15/Apr/2026

Next AIRAC Cycle: 16/Apr/2026

Navigation Database Cycles

Flight Management System (FMS) navigation data including waypoints, airways, airports, and procedures.

CycleIssue DateEffective DateStatus
260311/Mar/202619/Mar/2026Active (27 days)
260408/Apr/202616/Apr/2026Available (effective in 1 days)
260506/May/202614/May/2026Upcoming (in 29 days)
260603/Jun/202611/Jun/2026Upcoming (in 57 days)
260701/Jul/202609/Jul/2026Upcoming (in 85 days)
260829/Jul/202606/Aug/2026Upcoming (in 113 days)
260926/Aug/202603/Sep/2026Upcoming (in 141 days)
261023/Sep/202601/Oct/2026Upcoming (in 169 days)
261121/Oct/202629/Oct/2026Upcoming (in 197 days)
261218/Nov/202626/Nov/2026Upcoming (in 225 days)
261316/Dec/202624/Dec/2026Upcoming (in 253 days)

TAWS & Vision-1 Terrain Cycles

Terrain elevation databases for Enhanced Ground Proximity Warning Systems (EGPWS/TAWS) and synthetic vision systems.

CycleEffective DateStatus
140121/Oct/2014Active (4194 days)

TAWS Obstacle Cycles

Obstacle databases for man-made structures including towers, wind farms, and buildings that pose hazards to flight.

CycleEffective DateStatus
RN260122/Jan/2026Active (83 days)
RN260216/Apr/2026Upcoming (in 1 days)
RN260309/Jul/2026Upcoming (in 85 days)
RN260401/Oct/2026Upcoming (in 169 days)
RN260524/Dec/2026Upcoming (in 253 days)

Database Management Guidelines

Navigation (NAV) Updates
  • Commercial Operators: Update within 28 days of effective date
  • General Aviation: Update per operations manual or 56-day cycle
  • Critical: Always verify RNP/RAIM availability with new cycles
TAWS/Vision-1 Updates
  • Terrain: Typically 56-day or 28-day cycles depending on region
  • Obstacles: Critical for wind farm and construction areas
  • Verification: Cross-check with NOTAMs for temporary obstacles

Update Planning Best Practices

Activity Recommended Timing Responsible Party
Download new cycle data 5-7 days before effective date Maintenance Planning
Validate data integrity Before loading to aircraft Avionics Technician
Load to aircraft 1-3 days before effective date Certified Personnel
Post-load verification Immediately after loading Pilot or Technician