WWII German Kriegsmarine “Funktagebuch” Daily Radio Dairy – U-Boat / Destroyer – Rare

Description

A Funktagebuch (“radio logbook” in German) was a crucial document used onboard German naval vessels and U-boats during World War II. It played an essential role in recording all radio communications and associated activities, which were critical for operational security, coordination, and post-mission analysis.

Purpose of the Funktagebuch:

1. Record of Communications:

   • All incoming and outgoing radio messages (Funkverkehr) were logged, including:

     • Encrypted messages (Enigma)

     • Plaintext communications

     • Orders from high command (e.g., Befehl von BdU – “Order from U-boat Command”)

     • Contact reports, weather reports, and distress signals

2. Technical Logging:

   • Times of transmission and reception (in 24-hour UTC/GMT format)

   • Frequencies and call signs used

   • Message identification numbers

   • Signal strength and reception quality

3. Security and Accountability:

   • Ensured that messages were properly received, decoded, and acknowledged

   • Served as an official record in case of investigation or loss of vessel

   • Could be reviewed by Kriegsmarine command (BdU – Befehlshaber der U-Boote) for performance and procedural compliance