SP8WJT/HF8V - RED ARMY RADIOTELEGRAPH SIMULATOR - SP8WJT/HF8V BRITISH ARMY ver. 4.29 OVERVIEW: The messages could be easily intercepted for three reasons: each net operated on a single frequency, frequencies were changed only at regular intervals, and the British used a call sign system which facilitated the identification of the NCS and secondary stations. Nor were those defects offset by the excellent radio discipline which the British observed in the beginning. When the latter deteriorated, even the most skillful encipherment could no longer guarantee security. Secrecy was lost by the mention of towns, areas, and troop designations in the clear. The careless way in which radio operations were carried out suggests that the British underestimated German communication intelligence. (source: [3]) CALLSIGNS: Old format 4L, new 3L Old and new (1940) callsign system is well explained in [4]. FREQ: Assumed. As found in german materials british often used low frequencies (MF or IMF rather than low HF I think). Also on MF Maritime band (probably army-division nets). TRAFFIC FORMAT: (1941-1943) 4F often used (but various codes were used and also formats changed) OPCHAT/PROCEDURES: For listing of operating signals see [1] (in polish). Very characteristic: - V as calling sepator - 2x2 calling - used instead of K - signal always used as starting signal - signal used for first calling - unknown station - signal used for bad readability. - ii separator used - VERY slow (16 WPM was typical training/operation) CODES: X codes used. (X and figures). See: X codes. SIMULATION: Fixed (assumed) callsigns used (new 3L format). Currently 9 networks defined, 7 divisional and 2 army. Features (Scenarios) simulated: a/ Radiocheck b/ Unknown Station a/ Radiocheck stn1: ^ ORK ORK V SET SET ] + (NCS is calling OSN1 (no net call used here). ^ or as starting signal. ] or for preliminary call, while as end of transmission) stn2: ^ SET SET V ORK ORK + (answer) wait 2s ... (another net stations the same) ... b/ Unknown Station stn1: ^ SET SET V FWL FWL ] + (QSA BD) stn2: ^ ! ! V SET SET 2 ii X 599 + ( - I cannot hear you, your signal is bad, X599 - send ur callsign 1 minute) stn1: ^ SET SET V FWL FWL.....(calling aprox. 1 minute)... + ... (no further answer) ... --- DIVISIONAL NETS --- NET #1 BAT UNDEF BRITISH DIV_1 HQ ILR UNDEF BRITISH DIV_1 REGIMENT_1 YUK UNDEF BRITISH DIV_1 REGIMENT_2 JED UNDEF BRITISH DIV_1 REGIMENT_3 HZM UNDEF BRITISH DIV_1 REGIMENT_4 PVO UNDEF BRITISH DIV_1 REGIMENT_5 FREQ: 3210 NET #2 IKY UNDEF BRITISH DIV_2 HQ BGK UNDEF BRITISH DIV_2 REGIMENT_6 EXT UNDEF BRITISH DIV_2 REGIMENT_7 DFZ UNDEF BRITISH DIV_2 REGIMENT_8 HVQ UNDEF BRITISH DIV_2 REGIMENT_9 YNA UNDEF BRITISH DIV_2 REGIMENT_10 FREQ: 2570 NET #3 HZA UNDEF BRITISH DIV_3 HQ FKU UNDEF BRITISH DIV_3 REGIMENT_11 PLY UNDEF BRITISH DIV_3 REGIMENT_12 LBN UNDEF BRITISH DIV_3 REGIMENT_13 TCF UNDEF BRITISH DIV_3 REGIMENT_14 IQV UNDEF BRITISH DIV_3 REGIMENT_15 FREQ: 4510 NET #4 BFK UNDEF BRITISH DIV_4 HQ SER UNDEF BRITISH DIV_4 REGIMENT_16 LWM UNDEF BRITISH DIV_4 REGIMENT_17 IDV UNDEF BRITISH DIV_4 REGIMENT_18 TAN UNDEF BRITISH DIV_4 REGIMENT_19 XPH UNDEF BRITISH DIV_4 REGIMENT_20 FREQ: 1632 NET #5 SET UNDEF BRITISH DIV_5 HQ ORK UNDEF BRITISH DIV_5 REGIMENT_21 PQM UNDEF BRITISH DIV_5 REGIMENT_22 BIG UNDEF BRITISH DIV_5 REGIMENT_23 FWL UNDEF BRITISH DIV_5 REGIMENT_24 HYD UNDEF BRITISH DIV_5 REGIMENT_25 FREQ: 5040 NET #6 XGA UNDEF BRITISH DIV_6 HQ HKR UNDEF BRITISH DIV_6 REGIMENT_26 FCD UNDEF BRITISH DIV_6 REGIMENT_27 IZO UNDEF BRITISH DIV_6 REGIMENT_28 BVN UNDEF BRITISH DIV_6 REGIMENT_29 LUM UNDEF BRITISH DIV_6 REGIMENT_30 FREQ: 3344 NET #7 YAZ UNDEF BRITISH DIV_7 HQ BRG UNDEF BRITISH DIV_7 REGIMENT_31 HCU UNDEF BRITISH DIV_7 REGIMENT_32 PXL UNDEF BRITISH DIV_7 REGIMENT_33 IFN UNDEF BRITISH DIV_7 REGIMENT_34 JMQ UNDEF BRITISH DIV_7 REGIMENT_35 FREQ: 2640 TOTAL: 7 DIV, 35 REGS --- ARMY NETS --- NET #8 NC UNDEF BRITISH ARMY_1 HQ DSL UNDEF BRITISH DIV_1 HQ BFA UNDEF BRITISH DIV_2 HQ HJK UNDEF BRITISH DIV_3 HQ PWG UNDEF BRITISH DIV_4 HQ FREQ: 1777 NET #9 BK UNDEF BRITISH ARMY_2 HQ SAN UNDEF BRITISH DIV_5 HQ BZC UNDEF BRITISH DIV_6 HQ PMI UNDEF BRITISH DIV_7 HQ FREQ: 2330 PROBABILITY: 50% (odd minute) PLANS: Assigning historical divisions into army nets, etc.. Freqs changing (night/day or even/odd day), etc, simulation of everydays freqs changing. SOURCES: [1] Znaki Korespondencyjne, Wielka Brytania 1940 (on the basis of "Signal Training Volume V Signal office organisation and procedure 1938") [2] TELECOMMUNICATIONS IN WAR, COLONEL SIR A. STANLEY ANGWIN, 1947 [3] TICOM I-51 Hertzfeld british Wo Codes [4] http://nigelef.tripod.com/artycomm.htm