So to clarify here, this is indeed used for navigation. At the time no GPS existed of course, so pilots had to rely on either radio signals or visual clues on the ground to tell them where they are. The radio signals, if the pilot could tell where they were coming from, would indeed help triangulate their location. Quite necessary, particularly in eastern Poland where German radio signals had a harder time reaching.
If the radio tower continually transmitted the requested callsign in between the other stuff, it would be easy to tell where the radio tower was. The Germans at this point expected the Soviets to help invade already as they had agreed upon. By mentioning “Minsk” a lot in the transmissions they effectively did the same thing, but a bit less overt. This allowed the Soviets to retain some element of surprise against the Poles.
On the 10th of September, the Nazis urged Molotov to begin the Soviet side of the invasion to uphold their end of the agreement, but Molotov held off due to the war with Japan. This gave them a convenient reason to wait until Polish resistance had been broken before going in. One week later, war was declared and the Soviets invaded.
Nice dig! I found a Russian source which says the same: https://hrono.ru/sobyt/1900war/1939pol.php
So to clarify here, this is indeed used for navigation. At the time no GPS existed of course, so pilots had to rely on either radio signals or visual clues on the ground to tell them where they are. The radio signals, if the pilot could tell where they were coming from, would indeed help triangulate their location. Quite necessary, particularly in eastern Poland where German radio signals had a harder time reaching.
If the radio tower continually transmitted the requested callsign in between the other stuff, it would be easy to tell where the radio tower was. The Germans at this point expected the Soviets to help invade already as they had agreed upon. By mentioning “Minsk” a lot in the transmissions they effectively did the same thing, but a bit less overt. This allowed the Soviets to retain some element of surprise against the Poles.
On the 10th of September, the Nazis urged Molotov to begin the Soviet side of the invasion to uphold their end of the agreement, but Molotov held off due to the war with Japan. This gave them a convenient reason to wait until Polish resistance had been broken before going in. One week later, war was declared and the Soviets invaded.