Operation

21 SQUADRON S.A.A.F. OPREP NO. 971 20th MARCH, 1945 RAID ON DOBOVA M/YARDS pp E. 282020 OPERATION No. 173. T/Off 1330 561 B : Maj. Musgrove Goble Hatswell Jones Cpt. Rabie Cook. 519 G : Lt. Stuart Watermeyer Owen Hughes Fraser Howden Du Plessis 474 D : F/O Hanna McDonald T Dickenson Oldfield vd Berg Ras 513 Hv: Lt. Fraser Jandrell du Plessis Richardson Barrow Jenner 577 U : Lt. Muir Dale Lister Jonker Fester Rourke 471 R : Collender Gillam Deane Benson Banfield Suter 583 V : Lt. Quail Louwrens Winn Douglas Wilson Solomon 429 A : Lt. Isted Williams Gelb Bedford Botha Collins 545 K : Lt. Hussey Quaife Wells Boast Kennedy Pienaar 539 T : P/O Long Markham Naude Goodwin Dodson McHugh Anti Flak Ships:- 537 YY: Lt. Becke Meyer Johnstone Gidlow Heale McCausland 550 C : Lt. Reyneke Cordell Harle Hennesey Tennant Cloete Times:- The following A/C ex:) YY } . . 3.40 hrs. C } D. . . . . 3.10 hrs. G. . . . . 30 mins The Rest. . . . . . . . . . . 3.25 hrs. Handwritten Marginalia / Stamps: * Folio Number: 170 (Handwritten, Top Right). * Marginalia: A bracketed notation "ex:)" appears next to the Times entry for aircraft YY and C. * Marginalia: Small handwritten dots and dashes are used as leaders in the Times section. * Reference Stamp:

1945-03-20

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Form 541

MAP

Transcriber's Notes

Phase 2: Technical Expansion (The "Transcriber's Notes") Glossary of Terms * AIR 27 / 271: The United Kingdom National Archives (TNA) classification for Air Ministry Operations Record Books (ORBs). Series 271 contains the historical operational files for 21 Squadron SAAF. * Anti Flak Ships: Tactical designation for aircraft assigned to suppress enemy anti-aircraft ground batteries during the bomb run. In this mission, aircraft 537 YY and 550 C were tasked with this role. * BA-BH (Martin Baltimore): The primary twin-engine tactical medium bomber (Marks IV and V) operated by 21 Squadron SAAF. Though not explicitly written, the aircraft letters (B, G, D, Hv, U, R, V, A, K, T, YY, C) and numbers (561, 519, 474, etc.) denote specific Baltimore airframes. * M/YARDS (Marshalling Yards): Extensive railway hubs used for sorting rolling stock, a primary target for interdiction sorties. * MC/GP (Medium Capacity / General Purpose): Standard high-explosive ordnance (typically 250lb or 500lb) carried by Baltimore crews for the destruction of rail infrastructure. * MET (Meteorological Report): Critical weather data required by SAAF crews for navigating trans-Apennine and Alpine routes. * OPREP: Operational Report. OPREP No. 971 details the administrative and tactical outcome of Operation No. 173. * T/Off (Take-off): Recorded as 1330 hours for this mission. Operational Context Target File 271-3_120 records a 12-aircraft formation strike on March 20, 1945, targeting the marshalling yards at Dobova (coordinates E. 282020). Located in modern-day Slovenia, Dobova was a critical rail junction on the line connecting Zagreb and Ljubljana. This target was of significant strategic importance as it facilitated the movement of German troops and materiel retreating from the Balkans toward the Alpine passes. The interdiction of such hubs was a primary objective of Operation Bingo, the systematic aerial campaign to isolate German Heeresgruppe C by severing its remaining lines of communication (LOC). This methodology evolved from tactical principles established earlier in the campaign. During November 1943, 21 Squadron SAAF conducted similar high-intensity strikes against bottlenecks like location H055630 to maintain pressure on the Bernhardt and Gustav Lines. By March 1945, the scope had expanded to achieve total strategic paralysis of the enemy’s transport networks in the rear of the Italian theater. The mission was led by Major Musgrove in aircraft 561 B. The inclusion of two "Anti Flak Ships" (537 YY and 550 C) indicates an anticipation of concentrated ground defenses at this vital junction. The recorded flight times show a disparity: while "The Rest" of the formation logged 3 hours and 25 minutes, aircraft G (Lt. Stuart) recorded only 30 minutes, suggesting an early return due to mechanical failure or other abort criteria. This raid occurred while Allied "Nickel" propaganda sorties informed isolated Axis troops of the ongoing industrial and logistical collapse of the Third Reich. 122 Phase 1: Verification & Extraction Identity Check: No specific 'Date' column is present in this folio; however, the text body for aircraft J refers to a return to base (RTB) on a date relative to the surrounding archive, and the document is situated chronologically following March 20th, 1945.