Referenties - BOTA - Bunkers On The Air - Zuid Limburg

http://www.wwbota.org  
WWBOTA is Worldwide Bunkers on The Air. It is an amateur radio activity open to radio amateurs and shortwave listeners worldwide.

WWBOTA is an exciting mix of amateur radio and history enabling radio amateurs to ‘activate’ with portable and mobile operations from historic bunker locations and for hunters and chasers to have QSOs with those activating stations (and should they wish to, to ‘collect’ the special ‘bunker reference’ numbers). Free awards for activating and hunting bunkers are available but it’s also okay if you’re not interested in awards but just want to get involved by having a QSO or shortwave listening. Whatever your approach – have fun!

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De Nederlandse groep die aandacht geeft aan de nationale bunkers: https://pa3efr.nl/index.php/miscellaneous/dutch-bunkers-on-the-air-pabota
De site is helaas een beetje rommelig. Je vindt er een mooie kaart ( Google Map ) mel alle erkende bunkers en monumenten van Nederland.
Ik heb mij gericht op de wester buren : https://onbota.be/home   Welcome to Belgium's Bunkers on the air.ONBOTA is a thrilling Amateur Radio activity that combines exploration, historical appreciation, and radio communication in a unique and adventurous way.