As the sunsets on 30th November and the dawn on 1st December awakens, perhaps most of us do not realise how momentous this occasion is to the Indian Air Force. The Indian Air Force’s leap from four to seven squadrons on this day in 1942 was a change born not of grand proclamations, but of pressure, improvisation, and a belief that the young Service could carry more weight than anyone had assumed.
On paper, the story is simple. Three new squadrons, Nos. 6, 7 and 8, join the order of battle. In reality, they grow out of six overlooked Coast Defence Flights that have spent the past year patrolling India’s coasts in small numbers, flying long, unremarkable sorties far from the fighting in Burma.
Why should scarce aircrew and ground staff stay tied to lonely coastal strips when the main war lies elsewhere? The answer turns the Flights into raw material. Their people are pulled together, reorganised and renamed, and three squadrons appear where six Flights once stood. Seen only on a calendar, 1 December looks like a sudden leap. Seen through the paperwork behind it, it is a careful, sometimes fragile attempt to stretch a young air force to meet a crisis that will not wait.
A Theatre Under Strain
The IAF’s expansion in late 1942 did not burst forth from a single crisis. Its origins lie a year earlier, when the fall of Rangoon and the first reach of Japanese air power forced planners in Delhi to rethink how India was to be defended from the sky. As early as November 1941, a thin file titled “Expansion of Indian Air Force” had begun circulating through Air Headquarters.
Through the first half of 1942, this faint idea gathered urgency. Signals between Delhi and the Air Ministry spoke of an Allied air force of forty-six squadrons to be built up in India, with only five expected to be Indian. In internal discussions, the ambitions ran even higher. Some sketches imagined the IAF eventually stretching to ten squadrons, an idea that flickers in the autumn minutes as debate rages over a possible No. 5 Squadron and even the conversion of Nos. 3 and 4 to Vengeance units.
Meanwhile, the war itself was sliding out of control. Between January and May, Burma collapsed. Japanese bombers struck across the Bay of Bengal. RAF units were redeployed in frantic patterns, trying to shore up a collapsing front. Suddenly, the long Indian coastline, once feared as the likeliest invasion route, seemed less urgent than the desperate need for air support in the east.
This shift cast an unexpected spotlight on the IAF’s most overlooked formations: the six Coast Defence Flights. Spread across Madras, Bombay, Calcutta and a scattering of smaller ports, they flew routine patrols in small numbers, born in late 1939 out of anxiety rather than design. Yet they held something precious: trained pilots, wireless operators, air gunners, and ground crews who had kept aircraft flying under challenging conditions.
For a brief moment in mid-1942, Air Headquarters even considered expanding the Flights into Hudson squadrons, each with sixteen aircraft. But the Hudsons never came in the promised numbers, and the war’s centre of gravity shifted inland. By late summer, the consensus was stark: these Flights still consumed manpower but no longer justified their dispersal.
By autumn, the need was clear. The IAF was required not for coastal patrols but for fighter reconnaissance and light bombing over Burma. If the Service were ever to meet the ambitions outlined on paper, whether five, seven, or even ten squadrons, the Coast Defence Flights would have to be broken up and re-formed into something more useful.
It was in this atmosphere, taut with strain and possibility, that the pivotal meeting of 18 October 1942 took place. The war had pushed India to the brink, and the IAF was preparing, for the first time, to step into a larger, more consequential role.
The 18 October Conversation
The turning point appears almost quietly in the file: a single minute dated 18 October 1942, written after a discussion between the Air Officer Commanding in Chief, his Senior Air Staff Officer and the IAF Liaison Officer. The paper itself looks routine. The ideas inside it are anything but.
The note lays out its case with brisk clarity. First, it proposes raising two new squadrons at once. One would be a light bomber squadron, built around the Indian personnel already serving with No. 353 General Reconnaissance Squadron. The other would be a fighter squadron formed from No. 1 Coast Defence Flight and what remained of No. 4 Coast Defence Flight. If this could be done quickly, the IAF would gain two extra claws for the Burma front without waiting for fresh drafts from overseas.
The next move is bolder still. All six Coast Defence Flights, the minute suggests, should be abolished outright. Their ground crews would be redistributed to bring the existing four squadrons and the two new ones up to strength, giving the IAF six squadrons with proper establishments. Their officers would be pulled off coastal duties and attached to Army formations, gaining the field experience they would need as future fighter reconnaissance or bomber reconnaissance leaders.
Even that was only a staging point. The AOC in C, the minute records, wanted seven IAF squadrons operational by the end of March 1943. To reach that figure, some of the officers embedded with the Army would have to be recalled ahead of schedule, pushed through Operational Training Units in February and then used to form yet another squadron, provided the ground trades could somehow be scraped together.
The tone carries a kind of nervous confidence. The planners know they are betting on a lot at once: on training schools, on RAF cadre support, on coaxing just enough fitters, armourers and wireless trades out of the system without breaking it. They also know that nothing here is entirely in their hands. Every line of the plan will have to be argued up to the Commander-in-Chief, the War Department in Delhi, and the Air Ministry in London, which alone controls the flow of aircraft.
From this date on, the romance of expansion gives way to the grind of detail. The staff now have to answer the questions that decide whether any of this can work: what these new squadrons will fly, how they will be trained, and whether India can truly man them without pulling the rest of the Service apart.
The Aircraft Dilemma
Once the expansion was agreed in principle, the next obstacle arrived in the form of cold numbers. It was one thing to create squadrons on paper, quite another to find the aircraft to give them life.
The natural impulse was to do what had worked already: form another Hurricane fighter reconnaissance squadron. But as soon as the idea reached the Chief Maintenance Officer, it stalled. Hurricanes were coming into India at roughly seventy-five a month, and every one of them was already spoken for. Twelve RAF Hurricane squadrons in the east, two Mohawk squadrons due to convert, two IAF units and a hungry training pipeline all depended on the same stream. Any new IAF Hurricane squadron would exist only by starving somebody else.
So the search for an answer shifted away from fighters to dive bombers, and in particular to the Vultee Vengeance. The type was not yet plentiful in India, but it had one crucial advantage. Deliveries were planned with expansion in mind, training syllabi were stabilising, and the RAF was already weaving the Vengeance into its plans for Burma. Where the Hurricane flow was at its limit, the Vengeance offered headroom.
In parallel, a thoughtful but ultimately impractical idea was floated. The IAF already had No. 3 and No. 4 Squadrons, both operating in demanding roles. Could one of these be converted to Vengeances instead of raising entirely new units? The proposal flickers through the correspondence, but it evaporates quickly. Both squadrons were too committed and too valuable in their current roles, and converting either would risk losing more than it gained.
Which brought the staff back to the inevitable pairing: one new Hurricane FR squadron if the machines could be found, and two new Vengeance light bomber squadrons, whose aircraft stream was better poised to support rapid formation.
Thus, without yet stating their final names, the shapes of No. 6, No. 7, and No. 8 Squadrons were already settling into place. The aircraft question was not fully solved, but the direction was clear enough for the next set of problems to surface — the problems of people.
The Manpower Arithmetic
Every new squadron demanded a small village of trades: fitters, riggers, armourers, wireless operators, MT mechanics, clerks, cooks, and the quiet multitude that keeps an air force alive. The six Coast Defence Flights offered a pool of trained men, but nowhere near enough.
For the two squadrons planned for December, the staff calculated a requirement of just under five hundred Indian Other Ranks. The Flights and existing squadrons could spare around four hundred and twenty, leaving a gap that could not be dismissed as a rounding error. Looking ahead to February, when a third squadron was proposed, the deficit widened. Training schools could produce only half the numbers needed. By the time the totals were written up, the file recorded an overall shortage of more than 200 Indian Other Ranks.
British Other Ranks proved even harder to pin down. Three new squadrons needed 150; the system could provide barely 137. It simply meant that every new squadron would have to start life under-strength and grow into its establishment over time.
Then there was the officer cadre, a problem less neatly expressed in tables but felt just as sharply. And yet, despite these shortages, the tone was never defeatist. RAF cadre support would cover part of the gap. Training outputs could be accelerated. Some trades could be carried short for a few months until new drafts arrived. The system, strained as it was, would have to bend without breaking.
What matters is that by the end of this manpower analysis, the staff had accepted the central truth: the IAF could expand to seven squadrons, but only if every available hand was pulled from every corner of the organisation and made to serve this single purpose. It would require compromises, half-measures, and a great deal of trust — but it could be done.
With aircraft provisionally assigned and manpower scraped together, one more challenge lay ahead: how to train these new formations quickly enough for them to matter.
The Training Bottleneck
Once the squadrons were conceived and the people roughly accounted for, everything converged on a final choke point: training. It was the one part of the system that could not be bullied into working faster.
The training pipeline in late 1942 was already running hot. The Hurricanes fed into 151 Operational Training Unit, the Vengeances into 152 OTU, and both relied on a steady output from schools like Andheri, which produced wireless operators and air gunners at a carefully balanced pace. The expansion plan forced that balance to the edge.
To meet the December plan, Hurricane pilots from the Coast Defence Flights would have to begin their courses immediately, without waiting for ideal batch sizes. The Vengeance crews — pilots, observers, and W/Op-AGs — would also be rushed into 152 OTU as soon as their aircraft and instructors were aligned. The first two squadrons could be made ready with some difficulty by early 1943.
But the third squadron, slated for February, was another matter. The Andheri school could not conjure wireless operators and air gunners on demand, and every intake was already spoken for. On top of that, the Advanced Training Unit at Bhopal added a non-negotiable requirement: a gunnery and bombing refresher course of three to four weeks for all Vengeance aircrew. However lean the formations were made, this step could not be skipped.
The plan was adjusted around it, the expectations recalibrated with a practised wartime patience. The first squadron of Vengeances would enter service on time; the second would follow as soon as the training pipeline allowed. The fighter reconnaissance squadron would depend on recalling a handful of officers from their Army attachments and pushing them through the February course.
It is in these pages that the quiet resilience of the IAF’s wartime system becomes visible. The institutions were small, the resources slim, but the machinery of training kept moving. The expansion would not be elegant, but it would be real. And by early 1943, new units would indeed be taking shape.
All that remained was to decide what these squadrons would be called — a deceptively simple question that sparked its own debate.
The Squadron Numbering Debate
With the shape of the expansion clear, the planners were left with a question that seems cosmetic at first glance but mattered enormously to a young service carving out its identity: what should these new squadrons be called?
Three possibilities are floated, each with its own appeal.
The simplest idea was also the most tempting: continue the IAF’s existing lineage and name the next three units No. 5, No. 6, and No. 7 Squadrons. The problem surfaced immediately. RAF No. 5 Squadron was already serving in India. In a theatre stitched together by teleprinters, field signals, and handwritten operations logs, two “No. 5 Squadrons” could not coexist without inviting mistakes. The proposal was noted and quietly set aside.
A second idea had roots earlier in the year. Back in June 1942, when Air Headquarters was still considering expanding the Coast Defence Flights into Hudson squadrons, the Flights had been assigned the numbers 101, 102, and 103. But that plan belonged to another moment — a time when the war still seemed to demand maritime reconnaissance rather than land-based support for Burma. By October, the Hudson dream had faded, and the 100-series numbers with it.
The third path — and the one the IAF eventually walked — was to take a modest step forward in its own lineage. If the existing units ended at No. 4 Squadron, then the next logical additions would be No. 6, No. 7, and No. 8 Squadrons. This preserved the IAF’s distinctive single-digit identity while avoiding conflicts with the RAF formation.
Thus, almost quietly in the paperwork, the names took form. The fighter reconnaissance unit would be No. 6 Squadron. The two Vengeance light bomber units would become No. 7 and No. 8 Squadrons. What followed next was the moment where the entire plan ceased to be an argument on paper and became a living change in the organisation: the night the Coast Defence Flights were dissolved, and the morning on which their men awoke as members of three entirely new squadrons.
The Night the Coast Defence Flights Disappeared
The administrative end of the Coast Defence Flights came, as such things usually do, without ceremony. On 30 November 1942, orders went out that the six IAF Coast Defence Flights were to be wound up. The next day, they would reappear on paper as something entirely different: the No. 6, No. 7, and No. 8 Squadrons of the Indian Air Force.
Threaded through this change was the career of Sqn Ldr Hemango Nath Choudhuri. The Indian flight of 353 Squadron had previously existed as No. 3 (Calcutta) Flight, a small unit formed in June 1940 that later served in Burma and did well. Its former commanding officer had become the Indian Flight Commander in 353 Squadron. When the Coast Defence Flights were broken up and their personnel redistributed to the three new squadrons, Sqn Ldr HN Choudhuri was logically appointed Commanding Officer of No. 7 Squadron.
On paper, all three squadrons came into being that day. In practice, they lived for many months as formations in transition. As the expansion tables had already warned, aircraft deliveries and training capacity lagged behind the administrative decisions. All three squadrons went almost immediately to the Operational Training Units — No. 6 Squadron to 151 OTU on Hurricanes, Nos. 7 and 8 to 152 OTU for Vengeance conversion.
This long OTU period created one of the enduring confusions in later accounts. Many contemporary narratives, understandably, date a squadron’s “real” beginning from the moment its crews and aircraft assembled on a dedicated base, not from an Air Headquarters signal. As a result, No. 6 and No. 8 Squadrons often appear in secondary sources as if they first took shape around March 1943, when Squadron Leader Mehar Singh (for No. 6) and Squadron Leader Niranjan Prasad (for No. 8) are shown taking over. In reality, the squadrons and their COs already existed on paper and in training at the OTUs; what March 1943 often captures is simply the moment when they became visible as fully formed units in the field.
The aircraft, too, arrived in the halting rhythm that the planners had feared. No. 6 Squadron received its Hurricanes in March 1943, No. 7 Squadron received its Vengeances only in May 1943, and No. 8 Squadron received its Vengeances in August 1943, several months after their official formation. By then, the officers and airmen had already been living as squadrons-in-waiting, honing procedures in training, building a sense of identity.
From there, their trajectories diverged but remained bound to the war in Burma. No. 6 Squadron, after its gestation in South India, moved to the front in December 1943, relocating to the forward strip at Cox’s Bazar and beginning the fighter-reconnaissance work that would make its name. No. 7 Squadron operated on Vengeances from Kumbhigram in 1944, and No. 8 Squadron took its place alongside No. 6 in the Burma campaign from late 1943 onward, remaining in theatre for as long as No. 6 did.
Seen from this distance, the disappearance of the Coast Defence Flights looks almost abrupt. One night they existed; the next morning they did not. But what really happened on 30 November–1 December 1942 was a careful transplantation. The small, scattered coastal units were not erased; they were folded into a new structure, under leaders like HN Choudhuri, Mehar Singh and Niranjan Prasad, and re-emerged as three squadrons that would carry the IAF’s colours through the hardest years of the Burma war.
A good read on the origin and life of CDFs in the IAF is this official IAF thread.
Leave a Reply