Strumble Removal From Service

Strumble HMS is no longer available for use.

Alternative Height Monitoring Systems are as follows;


North Atlantic – Shanwick (Mondays and Saturdays only)

USA, Thailand, Australia and China.

Canada (Mondays only)

Multiple ICAO regions currently developing implementation plans for AHMS including South America, Africa, Europe and Russia.


Europe – Linz, Geneva, Nattenheim

Japan – Setouchi, Niigata, Sendai


Availability of these systems can be checked through the relevant Regional Monitoring Agencies websites. Links to each RMA can be found here.