One more case - a helicopter MI-8 near Khabarovsk crashed, hooked on the stretches of the radio tower. Six men were killed.
The difference in coordinates (near the tower is 262 meters high) - more than 100 meters. Plus the difference in altitude is 35.6 meters.
May be, all the same it is necessary to change datum in other countries?
"Setup 1
In some areas outside of United States, datums other than WGS-84 or NAD-83 may be used.
If the GNS 430 is authorized for use by the appropriate Airworthiness authority, the required
geodetic datum must be set in the GNS 430 prior to its use for navigation."