COMM: NIL "Z"
42
To : H.Q. R.A.F. M.E.
From : I.O. 21 Squadron, S.A.A.F.
Serial No. : 21 Sqdn/139.
Date : 19 DEC 42.
OPREP No. 139 for period ending 1800 hrs. 19 DEC 42.
A to K NIL.
COMM : 5 hrs. 00 mins. (2 Baltimores)
T.O.O. 1800 hrs.
(Handwritten Signature: M. Averhoff) Capt.
I.O. 21 SQUADRON, S.A.A.F.
"A1"
43 42
P O S T A G R A M.
------------------
To : H.Q., R.A.F., M.E.
From : S.I.O., 21 Squadron, S.A.A.F.
Serail No. : 21 Squadron/172
Date : 19th January, 1943.
OPREP No. 172/172 A for pariod ending
0600 hours on 19th January, 1943.
A. (i) Castel Benito aerodrome
(ii) M.T. on road West of TARHUNA
B. 11 Baltimores.
C. (i) Medium level.
(ii) 8/11000ft.
(iii) 1928 - 2117 hours.
D. (i) 66 x 250 lbs. (G.P.) 43 det with Rods.
60 x 4lbs incendiaries
(ii) 4000 rounds .300 (One aircraft)
(iii) The aerodrome was easily located and approximately
50 bombs hit the target area; The N.E. and N.W.
areas being well covered. Seven fires were started.
Two aircraft bombed M.T. on ~~Main~~ Road West of
TARHUNA and in the wadi near the road. One air-
craft carried out a very determined straffing attack
and started a fire amongst parked M.T. at R.L. 6320.
(Map reference TRIPOLI 1:500,000 Sheet 2)
E. Nil
F. Nil
G. Nil
H. (i) 1800 hours (ii) 36 hours 40 mins.
J. Fair, Hazy over target areax.
K. 6 S/Ls Inaccurate, 4/6 Heavy Ack Ack guns. Inaccurate
Light Ack Ack slight and inaccurate.
Slight and inaccurate Breda fire from Road target.
COMM: NIL
(Handwritten Signature: [Illegible]) Capt.
Senior Intelligence Officer,
21 Squadron, S.A.A.F.
"Z"
42
To : H.Q. R.A.F. M.E.
From : I.O. 21 Squadron, S.A.A.F.
Serial No. : 21 Sqdn/139.
Date : 19 DEC 42.
OPREP No. 139 for period ending 1800 hrs. 19 DEC 42.
A to K NIL.
COMM : 5 hrs. 00 mins. (2 Baltimores)
T.O.O. 1800 hrs.
…
__o_O_o__
Form 541 Transcriber's Notes [AUTO-CLASSIFIED — VERIFY CATEGORY]
Phase 2: Technical Expansion (The "Transcriber's Notes")
Glossary of Terms:
* H.Q. R.A.F. M.E.: Headquarters, Royal Air Force, Middle East.
* I.O.: Intelligence Officer.
* S.A.A.F.: South African Air Force.
* OPREP No. 139: Operational Report number 139, the administrative serial for the 24-hour reporting cycle.
* A to K: Standardized reporting sections (A through K) for combat mission data such as target, bomb load, and results.
* COMM: Communication flight. In this context, it refers to non-combat transport, ferry, or liaison flights conducted for unit logistical purposes.
* Baltimores: Martin Baltimore twin-engine light bombers.
* T.O.O.: Time of Origin.
Operational Context:
OPREP No. 139 reflects a temporary lull in combat operations for No. 21 Squadron S.A.A.F. during the mid-December phase of the Western Desert Campaign. Strategically, this period followed the Eighth Army's breakthrough at El Agheila (13–15 December 1942), during which the Mediterranean Allied Air Forces (MAAF) were focused on rapid westward relocation to keep pace with the retreating Afrika Korps.
The "NIL" entry for sections A through K indicates that no offensive sorties were launched during this reporting window. Instead, unit activity was restricted to "COMM" (communication) flights, totaling five hours between two Martin Baltimores. These flights were essential Allied operations used to ferry personnel, urgent spare parts, or intelligence documents between forward landing grounds and rear headquarters during the logistical reorganization necessitated by the high-speed pursuit toward Tripoli.
The transition from combat to logistical support on this date illustrates the cyclical nature of tactical air power in the desert, where operational reach was frequently constrained by the need to secure new fuel and ammunition supplies before resuming the interdiction of Axis mechanical transport (MT). This document, archived as Folio 42 of the AIR 27/274 series, serves as primary evidence of unit status during the administrative intervals of the Libyan campaign.
52
Phase 1: Verification & Extraction
Identity Check: 19th January, 1943.
Phase 2: Technical Expansion (The "Transcriber's Notes")
Glossary of Terms:
* H.Q., R.A.F., M.E.: Headquarters, Royal Air Force, Middle East.
* S.I.O.: Senior Intelligence Officer.
* S.A.A.F.: South African Air Force.
* OPREP: Operational Report.
* Castel Benito aerodrome: The primary Axis airbase serving Tripoli, acting as a critical hub for the Luftwaffe and Regia Aeronautica.
* M.T.: Mechanical Transport. Refers to Axis supply and troop vehicles retreating toward the Tunisian border.
* TARHUNA: A town of significant tactical importance situated on the plateau overlooking the coastal plain, representing one of the final defensive anchors for Axis forces before Tripoli.
* ft: Feet.
* 250 lbs. (G.P.) 43 det with Rods: 250-pound General Purpose high-explosive bombs fitted with No. 43 tail pistols and nose extension rods (known as "daisy cutters"). These rods triggered detonation just above the surface to maximize lateral fragmentation against soft targets like aircraft and trucks.
* straffing: Low-level machine-gun attack (archaic spelling of 'strafing').
* S/Ls: Searchlights.
* Heavy Ack Ack / Light Ack Ack: Heavy and Light Anti-Aircraft artillery fire.
* Breda fire: Fire from Italian Breda-model anti-aircraft machine guns or light cannon.
* COMM: Communication flight. Refers to non-combat liaison or transport flights.
Operational Context:
OPREP No. 172 records a high-intensity nocturnal effort by No. 21 Squadron S.A.A.F. on 18–19 January 1943, involving 11 Martin Baltimore light bombers. Strategically, this mission occurred during the final four days before the fall of Tripoli. The Mediterranean Allied Air Forces (MAAF) were focused on a dual objective: neutralizing Axis air power at Castel Benito to prevent interference with the Eighth Army’s advance, and interdicting the retreating logistical tail (M.T.) in the Tarhuna sector.
The tactical results indicate a high degree of precision despite nocturnal conditions. At Castel Benito, approximately 50 bombs—many equipped with "daisy cutter" rods to maximize blast radius—struck the N.E. and N.W. dispersal areas, initiating seven fires. Simultaneously, the squadron targeted the Tarhuna-Tripoli road, where the Afrika Korps was attempting to reorganize.
The report highlights a "very determined straffing attack" by a single aircraft that expended 4,000 rounds of .300 ammunition to destroy parked vehicle concentrations in a wadi near Tarhuna. This relentless 24-hour pressure was instrumental in shattering Axis resistance on the Tarhuna-Homs line, facilitating the liberation of Tripoli on 23 January 1943. This document, archived as Folio 43 of the AIR 27/274 series, provides primary evidence of the S.A.A.F.’s maturity in nocturnal tactical interdiction during the definitive Axis collapse in Libya.
53
Phase 1: Verification & Extraction
Identity Check: 18 JAN 43.
