A Polish Army chart detailing a network of military pigeon lofts across several military districts, c. 1930-1938 Tags:poland 2 comments Are these lines unidirectional or bidirctional. Oh yes, long time no [IPoAC](https://en.wikipedia.org/wiki/IP_over_Avian_Carriers)! Leave a ReplyYou must be logged in to post a comment.
2 comments
Are these lines unidirectional or bidirctional.
Oh yes, long time no [IPoAC](https://en.wikipedia.org/wiki/IP_over_Avian_Carriers)!