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vertikaalse koonusekujulise suunadiagrammiga raadiomajakas, a type of radio beacon, the emissions of which radiate in a vertical cone-shaped pattern
Z marker beacon . Lennunduse terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//len/Z%20marker%20beacon/1/eng (15.11.2026)