http://wiki.openstreetmap.org/wiki/Proposed_features/Tag:man_made%3Dtower
http://wiki.openstreetmap.org/wiki/Proposed_features/Communications_Dish
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HB: radar dishes are not for communication
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RP: HB - i would say that in the bigger sense, radar dishes *are* for communication: information is transmitted from somewhere and picked up by the dish, so i think this fits. i think the dome part of this is misleading - it's merely a cover for the actual thin inside. thus the tag should reflect the content imo
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HB: RAdio Detection And Ranging: it's a navigational aid, as opposed to a microwave dish used for communication. They tend to get conflated, but they're different things.
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uploaded by someone for the mainland V16 dataset some time ago.