A communications drop is an old school way for two or more people to stay in touch in a clandestine manner. A drop is a secure location known only to the people who use the site but is not common knowledge to outsiders. In the event other forms of communication cannot be used due to an electro- magnetic pulse or other security considerations; a secure communications drop can be a way for families to remain in contact. Secure drops can be the inside of a hollowed out log or perhaps a secret area inside an outdoor deck. Written messages, coded or un-coded can be left to alert family and friends as to where and when you would like them to meet you. The nice thing about old school communication drops is there is no limit to how creative your drop sites can be.
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