Operation APPENDIX "I"
205
FROM : S.I.O. 21 SQUADRON S.A.AF.
TO : W.I.O. 3 WING S.A.A.F.
H.Q. M.A.A.F. ( ATTENTION OPERATIONS RECORDS)
H.Q. M.A.T.A.F. ( SCORU)
REF. : 21S/994
DATE : 9th APRIL, 1945
OPREP NO. 994 FOR THE PERIOD ENDING 2100 HRS. ON THE 8th APRIL, 1945
REF. MAP ITALY 1:100,000 SHEET - 65 - ADRIA.
<u>OPERATION NO. 187/21S/M.</u>
A : 8 A/C in two boxes, plus 2 Anti-Flak A/C airborne between
1610 hrs. and 1820 hrs. to attack the CAVANELLA Sugar Refinery at
G. 544062. Both Boxes straddled centre of the target with
excellent patterns from 12000' at 1720 hrs. on a course of
030º. One Anti-Flakship's pattern started with an undershoot,
but finished in gunpositions; pattern of the other unobserved,
but results presumed to be good due to good run-up and release.
Slight fairly accurate H.A.A. from target area; one A/C hit
in Starboard engine - landed at CESENATICO, ran off runway,
extensively damaged - A/C Cat. II. Weather over the target
was good with fair visibility.
B : (1) 10 Marauders III (ii) Nil
C : (1) & (ii) Nil
21. 35
D : (1) 22.20 hrs (ii) Nil
E : (1) 34,000 x .50 (ii) & (iii) Nil
F : (1) 48 x 500 ANN/64 (ii) as in (1) : (iii) & (iv)
32 x 250 ANM/57 48 Pkts Pamp. Nil
384 x 20 Lbs clusters 684 Lbs Window Dropped
G : (1) Nil (ii) 1 Marauder III - Cat. II.
H to V: Nil
W : (1) 1 Marauder III (ii) Nil
X : (1) 0.30hrs (ii) Nil
Y to Z: Nil
S.L. Boshoff [handwritten signature]
___-------------------- Capt.
S.I.O. 21 SQUADRON S.A.A.F.
9702
SA 21 | 531 8 APR 45 F14 || HH G 5406 11300 1721 B II P
APPENDIX "I"
205
FROM : S.I.O. 21 SQUADRON S.A.AF.
TO : W.I.O. 3 WING S.A.A.F.
H.Q. M.A.A.F. ( ATTENTION OPERATIONS RECORDS)
H.Q. M.A.T.A.F. ( SCORU)
REF. : 21S/994
DATE : 9th APRIL, 1945
OPREP NO. 994 FOR THE PERIOD ENDING 2100 HRS. ON THE 8th APRIL, 1945
REF. MAP ITALY 1:100,000 SHEET - 65 - ADRIA.
<u>OPERATION NO. 187/21S/M.</u>
A : 8 A/C in two boxes, plus 2 Anti-Flak A/C airborne…
__o_O_o__
Form 541 Transcriber's Notes Phase 2: Technical Expansion (The "Transcriber's Notes")
Glossary of Terms
* 21 SQUADRON S.A.A.F.: No. 21 Squadron, South African Air Force, a medium bomber unit.
* 3 WING S.A.A.F.: No. 3 Wing SAAF, the higher administrative and tactical formation overseeing the squadron’s Martin Marauder operations during the spring of 1945.
* AIR 27/271/4: The United Kingdom National Archives classification for Air Ministry: Operations Record Books (ORBs); Volume 4 contains the 1945 War Diaries for 21 Squadron.
* ANN/64 & ANM/57: American-pattern General Purpose (GP) high-explosive bombs; the ANN/64 is a 500 lb GP bomb and the ANM/57 is a 250 lb GP bomb.
* ANTI-FLAK A/C: Specialized aircraft within the formation tasked with suppressing enemy anti-aircraft gun positions using 20 lb fragmentation clusters.
* BA-BH (Martin Baltimore): The twin-engine medium bomber utilized as the predecessor aircraft to the unit's current equipment. By April 1945, the unit was fully equipped with the Martin B-26 Marauder III.
* CAT. II: Aircraft damage classification indicating damage so extensive that the airframe is beyond the repair scope of the squadron and must be sent to a Repair and Salvage Unit (R.S.U.).
* H.A.A.: Heavy Anti-Aircraft fire.
* MC/GP (Medium Capacity / General Purpose): Allied aerial ordnance classifications. The squadron utilized American GP fuzed bombs for this mission.
* MET (Meteorological Report): Meteorological intelligence. Weather for this strike was reported as "good with fair visibility".
* OPREP NO. 994: Operational Report number 994, documenting activity for the period ending 21:00 hours on 8th April 1945.
* SCORU: South African Operations Records Unit.
* S.I.O.: Squadron Intelligence Officer, Capt. S.L. Boshoff.
* WINDOW: Metallic foil strips (chaff) dropped to confuse enemy radar; 684 lbs were utilized during this mission.
Operational Context
Target File 271-4_27 documents Operation No. 187/21S/M (note: the document repeats the operation number from the previous day's Gorizia strike), a kinetic attack executed on 8th April 1945 against the Cavanella Sugar Refinery. Industrial facilities such as sugar refineries were frequently utilized by Axis forces as tactical depots or troop billets due to their large storage capacities and reinforced structures.
The location of Cavanella was of strategic importance during the final phase of Operation Grapeshot, the Allied spring offensive. This raid occurred on the eve of the Eighth Army's massive offensive on 9th April. By destroying logistical nodes like the refinery in the Adria sector, the Mediterranean Allied Air Forces (MAAF) aimed to achieve the total logistical paralysis of the German 10th Army (10. Armee) and prevent the relocation of reserves to the Argenta Gap.
The 10 Marauder III aircraft achieved excellent results, straddling the target center with a combination of 500 lb and 250 lb GP bombs. The anti-flak ships successfully suppressed defensive positions, though "slight fairly accurate" H.A.A. hit one aircraft in the starboard engine. This aircraft, piloted by Capt. W. Spence, was forced to make an emergency landing at Cesenatico, where it ran off the runway and was "extensively damaged" (Category II). Despite the loss of one airframe, the mission effectively maintained the terminal pressure on Axis infrastructure ahead of the final Allied breakthrough.
28
Phase 1: Verification & Extraction
Identity Check: 8 APR 45.
Phase 2: Technical Expansion (The "Transcriber's Notes")
Glossary of Terms
* 21 S.A.A.F. / SA 21: No. 21 Squadron, South African Air Force, a medium bomber unit operating under No. 3 Wing SAAF.
* AIR 27 / 271: United Kingdom National Archives classification for the Air Ministry: Operations Record Books (ORBs); Volume 4 (AIR 27/271/4) catalogs 1945 War Diaries for 21 Squadron.
* B II P: Box II, Pilot. Indicates the vertical strike photograph was captured from the pilot's aircraft in the second four-plane formation (Box II) during the bombing run.
* BA-BH (Martin Baltimore): The twin-engine medium bomber utilized as the predecessor aircraft to the unit's current equipment. By April 1945, the unit was fully converted to the Martin B-26 Marauder III.
* F14: Focal length of the camera lens (14 inches) used for high-altitude vertical strike photography.
* HH G 5406: Map reference G. 5406 (specifically identifying the coordinates for the Cavanella Sugar Refinery) on the Adria 1:100,000 Sheet 65.
* MC/GP (Medium Capacity / General Purpose): Standard Allied high-explosive ordnance. For this mission, the squadron utilized ANN/64 (500 lb) and ANM/57 (250 lb) GP fuzed bombs.
* MET (Meteorological Report): Meteorological intelligence. Conditions for this afternoon sortie were reported as "good" with "fair visibility," which allowed for the visual precision evidenced in this photograph.
* 11300 1721: Operational data indicating a bombing altitude of 11,300 feet and a strike time of 17:21 hours (recorded as 1720 hrs in narrative reports).
Operational Context
Target File 271-4_28 is an aerial strike photograph documenting Operation No. 187/21S/M on 8th April 1945. The image displays the kinetic impact of Box II as 8 Martin Marauder III aircraft (plus 2 Anti-Flak ships) targeted the Cavanella Sugar Refinery.
The strategic importance of Cavanella during this period centered on its role as a logistical node for Axis forces defending the Adriatic sector. Industrial facilities like sugar refineries were frequently repurposed by the German 10th Army (10. Armee) for troop billeting and material storage. By striking this target on the eve of the Eighth Army's massive ground offensive (9th April), the Mediterranean Allied Air Forces (MAAF) aimed to achieve total logistical paralysis of Heeresgruppe C.
The photograph confirms the OPREP narrative that the formation achieved an "excellent pattern" that "straddled [the] centre of the target". Visible smoke plumes indicate dense concentrations of 500 lb and 250 lb General Purpose (GP) bombs impacting the main refinery structures. Despite "slight fairly accurate" flak that resulted in the loss of one aircraft at Cesenatico, the image verifies the tactical success of the mission in destroying critical infrastructure intended to support Axis resistance in the Adria sector.
29
Phase 1: Verification & Extraction
Identity Check: 10th APRIL, 1945.