1. The range of messages sent was limited because more often than not becons had only one meaning
2. A smoke signal was of little or no use if no one was on the look out to report
3. Smoke signals could easily be misinterpreted and yet probably fire could have accidentally been started
4. Smoke signals could not be used to send message over long distances due to poor visibility
5. In windy, cloudy or misty conditions smoke signals was of no use because it could be blown away before the message is read
6. In wet conditions, starting fire was a difficult task
johnmulu answered the question on March 14, 2017 at 04:55
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