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Tag Archives: Q1

Was the first quarter really ‘Hot & Spicy’ or ‘Red’ for SpiceJet?

04 Tuesday Aug 2015

Posted by theflyingengineer in SpiceJet

≈ 1 Comment

Tags

2015, 2016, Analysis, Costs, loss, performance, profit, Q1, Quarter, revenue, Spicejet

Spice 737

In a previous piece, The Flying Engineer had estimated the operational profit of SpiceJet to lie in the INR “around or less than between INR 80 – 110 crore” range. The airline realised an operational profit of INR 70.7 crore. With the results declared exactly a week ago, we shall analyse the actual performance of the airline in Q1 FY 2015-16 (Q1’16).

We first start with costs, as an airline usually has a better grip on costs than revenues. Capacity is measured in seat-kilometres (Available Seat Kilometre – ASK), and costs and revenues, from operations, are referenced to unit capacity. We compare Q1’16 with the same quarter in the last financial year – Q1’15.

Operating Costs

Q1'15 vs Q1'16 SpiceJet Financial Performance - Operations

Average fuel price in Q1’16 was 28.4% lower than that in Q1’15. The fleet had also shrunk from a Bombardier Q400 : Boeing 737 ratio of around 1:2 to 1:1.3. This impacted fuel costs positively. Due to this ratio, a larger portion of the fuel burn was realised by the Q400s, which enjoy a flat 4% sales tax on fuel, as against as much as 28% sales tax in some airports, applicable to the Boeings. With operations being dominated more by the Q400s, which fly routes much shorter than the Boeings (upto 85% shorter routes on the domestic network), the average stage length had reduced, leading to an increase in the number of departures per unit capacity. More departures and hence landings per unit capacity translates to a higher fuel burn, but this was offset by the Q400’s lower fuel price and perhaps better fuel saving techniques employed at SpiceJet. Unit fuel costs fell by 30.3% despite fuel prices falling only 28.4%.

The changed turboprop : mainline jet fleet ratio also affected lease costs. The Q400s are owned, and hence no lease is paid for such airplanes. As a result, the lease costs of the Boeings (including the wet leased Boeings and Airbuses) were diluted over a capacity that was generated in a larger part by the Q400s. Unit lease rental costs fell by 12%.

Poor on time performance and increased cycles per unit capacity may have led to increased airport charges, though the Q400s do enjoy landing and navigation charges benefits. It is also possible that there may have been an increase in landing, navigation, other airport charges, in flight & other passenger amenities by authorities. Unit airport charges rose 14.8%.

Aircraft maintenance costs were dominated in larger part by the Q400s, which were also utilised higher. The US Dollar strengthened 6.1% against the rupee, which would have led to increased costs. Maintenance costs for each Boeing are expected to have remained largely unchanged. Unit maintenance costs rose by 14.9%.

The quarter witnessed no significant aircraft re-delivery activity, which dropped unit re-delivery expenses by 90.4%.

Other operating costs rose by 45.7% per unit.

Unit employee expenses were impacted by both having a smaller capacity, and the hike in salaries to crew to stop pilots from leaving the airline. This resulted in unit employee expenses rising by 25.5%.

Depreciation and Amortisation expenses are largely dominated by the Q400s. With lower capacity, this expense was rose on a unit basis. Unit Depreciation and Amortisation costs rose 36.2%.

Other expenses, which include a wide variety of costs including hotel and accommodation expenses for crew, dropped by 16.3% on a unit basis.

Overall, unit costs dropped by 12.8%, aided largely by the absence of significant re-delivery expenses and the steep fall in fuel prices. The airline has scope to further streamline costs in at least three areas, with the other areas being out of the airline’s control. When streamlined, either through practices or scale, unit total operational expenses may further fall by 4.3%. With the present scale of operations and in the present environment, this translates to INR 45 crore.

The cost structure at SpiceJet, Q1’16 v/s Q1’15 is shown below:

Q1'15 vs Q1'16 Unit Cost Structure

Operating Revenues

SpiceJet’s revenues were adversely impacted by lower airline capacity, poor on-time performance, and increased competition leading to lower prices. The first two factors may have made the airline lost high paying, time-sensitive and last minute (D0-D7) passengers. In the 13 month period June’14 to June’15, SpiceJet had the lowest OTP amongst private airlines for 9 months. Further, the cargo carried by the airline on a unit basis dropped by 4.9%, perhaps on account of Q400s dominating a larger part of the capacity. Unit sales fell by 1.1%.

Other operating income rose by 56%.

In total, operating revenues fell by 1% on a unit basis.

(If the Q1’15 P&L statement was not re-classified, unit revenue would have fallen by 2% during the comparison)

Per passenger Revenues

In Q1’15, the sales per passenger (includes ancillary revenue) was a good INR 5,006 per passenger (at re-classified P&L figures). In Q1’16, the the sales was INR 4,215 per passenger. This represents a drop of 15.8% in the sales per passenger.

Usually, a drop in the sales per passenger should not be a concern if the airline flies more passengers. However, a drop in net sales per passenger per ASK (the first number in the unit revenues and cost graph above) is a cause for worry. The drop was INR 0.05/seat-km). This shows that sales per passenger has dropped to a level that overall leads to lesser revenue despite very high load factors.

To put things in perspective, the below graph shows the per passenger sales required to achieve the same net sales from operations, with varying load factors. For example, flying with load factors of 55% at INR 6,939 sales per passenger will generate the same sales as flying 90% load factor at INR 4,240.

In Q1’16, SpiceJet had load factors of 90.5% (Domestic + International). In Q1’15, SpiceJet had load factors of 79% (Domestic + International). If SpiceJet was to have realised the same revenue in Q1’16 with only 79% load factors,the airline would have needed a per passenger sales of INR 4,833. However, the airline in Q1’15 (same quarter, last year) had a per passenger sale of INR 5,006.

This means that had SpiceJet flown with Q1’15 load factors and per-passenger sales, would have realised an increase in sales of 3.6% or INR 39.53 crore in Q1’16. This shows that increase in load factors does not always imply an increase in either Revenue per seat kilometer (RASK) or total revenues.

To have realised this additional INR 39.53 crore, SpiceJet should have generated sales of INR 4,366 per passenger (+INR 151) in Q1’16 at 90.5% load factors.

Per Passenger Sales SpiceJet Q1'15 vs Q1'16

Of course, unit revenues (RASK) is the most reliable method of gauging performance. But, in the case where RASK falls, the argument above is used to show that the load factor game must be played carefully.

The above argument does not consider the fact that per passenger sales and/or RASK (RASK and per-passenger sales are not directly comparable) can be safely reduced when per passenger costs and/or CASK also reduce. Ultimately, profit is driven by the difference of revenues and costs, and not determined by either revenues or costs alone.

Operating Profit

Unit operating profit rose by 201%, despite a fall in unit revenues, largely due to a fall in costs. Fuel today accounts for 35% of the SpiceJet’s operating expenses. Last year, for the same quarter, fuel accounted for 43% of SpiceJet’s operating expenses. If aircraft fuel prices were at the 2014 April-June levels, the airline would have flown into the red.

Had the airline maintained the unit revenues (RASK) of Q1’15, the airline would have generated an additional INR 11.4 crore over the Q1’16 operating revenue of INR 1,106 crore.

Other Income

Other income at the airline was INR 26.7 crore, against INR 28.9 crore in Q1’15 (re-classified).

Finance Costs

Finance Costs in the airline was INR 25.5 crore, against INR 48.7 crore in Q1’15

Profit before tax

In Q1’16, other income (not from operations) and finance costs are almost equal, cancelling out each other. This makes profit in Q1’16 solely due to operating profits, unlike the Q4’15 quarter (ending March 31st 2015) where the airline stepped into profits due to the insurance payoff. Operating loss in Q4’15 was INR 102 crore. Operating loss before depreciation and amortisation expenses was INR 72 crore.

Hot and Spicy or Red?

The Hot and Spicy part is the reduction in finance costs. The Red part in in the operational costs and revenues. Overall, the airline has the potential to perform much better, and hence we’d consider the performance Red, despite the profit. The turnaround has started, but the airline is not yet ‘there’. Costs have to lean and revenues must grow. Good on time performance (OTP) is key. As seen above, sale per passenger and RASK have taken a hit, perhaps largely due to the poor OTP of SpiceJet, and in part due to competition.

Comparison to Estimate

In the estimate of SpiceJet’s Q1’16 performance (click here to read), our estimate of total operating expenses was lesser by 0.26%, while our estimate of revenue from operations was higher by 1.67%. Changes in accounting practices (re-classification, as declared in the Q1’16 financial results) have also impacted the estimate errors. The lower or our estimate of the airline’s operating profit was higher than the actual by 13%. Below is the comparison:

Q1'16 actual vs Q1'16 estimate

SpiceJet: Out of excuses

20 Monday Jul 2015

Posted by theflyingengineer in SpiceJet

≈ Leave a comment

Tags

Financial, FY16, loss, profit, Q1, Quarter, Spicejet

737 SpiceJet

SpiceJet had a great opportunity to report profits in Q3’15 (the quarter ending December 31st, 2014). It didn’t. Before the quarter could conclude, the airline had stalled.

Then there was a stall-recovery. The Marans got out and Ajay Singh got in. The very next quarter, Q4’15, saw the airline posting a net profit thanks to an insurance claim from a Q400 that was written off at Hubli.

Legacy issues, one time costs, redelivery expenses, economic slowdown, high dollar rates, and high fuel prices were some of the reasons given in the past. This time around, the situation is much better. Ajay is doing a good job renegotiating contracts in manners that benefit the airline.

For the quarter ending June 30th 2015, we estimate the financial performance of the airline. Profit? Loss? Click here to read all about it.

Could SpiceJet spring a surprise with its Q1 Results?

05 Tuesday Aug 2014

Posted by theflyingengineer in Airline, Analysis, SpiceJet

≈ 2 Comments

Tags

13, 14, FY, loss, performance, profit, Q1, Spicejet

Triple_SGIt is widely believed in the industry that SpiceJet may post a Q1 loss. Some were convinced, based on personal estimates. Others heard whispers. But, there could be some hope. The Flying Engineer redoes some numbers to show how SpiceJet could (but not a guarantee that it will-this is purely an academic exercise) spring a surprise on a nation that is so used to seeing the red airline in the red.

The turning point

The airline started steering a different course with Chief Operating Officer Sanjiv Kapoor: the classy man heading SpiceJet at the operational front. The bigger turning point was when he restructured his top management, and bringing on board the new Chief Commercial Officer Kaneshwaran Avili, who is ex-AirAsia and ex-Tiger. To some of us who watch the industry, we are in absolute awe of Avili, not only for what he’s done, but for what he’s doing. There were other posts that got a fresh nameplate, but the biggest changes are the COO and the CCO.

Sanjiv, with his legacy experience, is all set to change the brand (image and offering) of SpiceJet, positioning itself as not a low cost carrier but a classy low cost carrier that caters, however limited, to the business crowd. Not surprising, as corporate flyers make most of SpiceJet’s bread and butter.

Avili, on the other hand, is keen on aligning the low cost carrier with global best practices for such airlines.

In short, Sanjiv caters to the first few rows of the aircraft, while Avili tries to work with the later rows in the cabin.

A great combination, in our humble opinion.

Results

You could have the best team, but in the end, all that ever matters are results. This is where the optimists and the pessimists are divided. For one, media reports (and verified true) of employees not receiving their form 16 from the airline is making most wonder if the airline has only sunk deeper, exhibiting the symptoms that plagued Kingfisher just before its downfall. These are the whisper driven crowd.

The optimists-some of whom (and who are just a handful) have reason to believe that the airline’s results – numbers – may have a different story to say, and maybe even spring a surprise on everyone.

To the numbers we March.

Load Factors

Passenger Load Factor TrendlineBeyond March-and before July make up the first quarter of the financial year. As shown in a previous analysis of SpiceJet by The Flying Engineer, there is a strong correlation between the passenger load factors and operational profits. April was a disappointing month for Spicejet (and few others), with domestic load factors that slumped compared to the previous year-for all carriers except Jet Airways and its low cost arm JetLite. In May, SpiceJet recorded and increase, and in June, displayed the best load factor increase performance, while IndiGo has been the only carrier to be in the negative for all three months of Q1.

Overall Market Demand

The second month of Q1-May-is typically the peak season for domestic travel. Yet, all carriers except Jet, Jet Lite, and SpiceJet reported a drop in load factors. Was there a slump in the demand for travel?

Year on Year (YoY), the Q1 of FY2014-15 recorded a 7% growth in domestic passenger traffic, while international recorded a 10% growth in traffic. Air Costa has grabbed less than 1% of market share, making us disregard the airline as a contributor to capacity increase. Overall, among the legacy full service and LCC carriers, capacity has increased far greater than demand, leading to low load factors.

But SpiceJet has done the opposite of IndiGo-it has slashed capacity in terms of seats, and ASKs. By pulling out six aircraft from its fleet, and with one Q400 temporarily grounded, it has deployed lesser capacity, but has managed an interesting result.

Efficiency of Commercial & Operations

Revenue and Cost Area changesSpiceJet’s fleet has shrunk from Q1 FY13 – sending off 2 Boeing 737s, and preparing six to be sent back to their lessors: 2 scheduled, and four early return, while adding 5 new 737 aircraft, including the latest 737- the infamous ‘Red Chilli’ with a special livery. Compared to Q1 FY13 SpiceJet seems to have had 3 more airplanes on its books, but three less operational aircraft (as six were being prepared for return). One Q400 may have been down for a fairly long period.

While the available fleet has shrunk, very interestingly, SpiceJet has performed positively with respect to a YoY growth when it comes to domestic passengers and cargo carried. These are sources of revenue. It has also shown a negative growth as far as flights, seat capacity, and available seat-kilometers are concerned. These three are sources of costs, which means the costs have reduced. These are numbers from the airline.

Overall, revenue indicators have grown, while cost indicators have shrunk. This can only mean one thing as far as direct operations are concerned: profits. And a similar encouraging trend is also seen in its international operations, which are just 10% of the airline’s overall deployed capacity (ASK). There, the fall in the number of passengers is small compared to the reduction in international ASK.

Overall, in Q1 FY14, SpiceJet flew just 23,400 passengers lesser than Q1 FY13, or just 0.7% lower. Which is impressive, in the face of a much higher airline capacity reduction.

Cargo carried in Q1 FY14 is much higher than Q1 FY13, showing an increase of 10%, or 1,868 tonnes extra.

Ticket Sales & Promos

SG_OffersOf those direct operation figures, as far as passengers are concerned, some seats are low yield seats, as these were promo seats sold across five sale campaigns: ‘Super Summer Sale’, ‘Super Holi Sale’, and three ‘Fly New Network’ promos.

The Summer sale was more an early sales drive, not exactly a ‘sale’. The ‘Super Holi Sale’ offered INR 1,999 tickets in Q4 FY13 for travel mid June onward (bookings 90 days in advance) – or just 1/6th of Q1-in June. Three ‘Fly New Network’ sales in Q1 FY14 were for flights in June, July and August, of which two were for travel only in 2/9th of Q1-in June. Since April and May are peak domestic travel seasons, no significantly low ‘promo’ seats were offered in those two months. Which means that the higher load factors in the month of May are largely a result of normal sales.

But in June, SpiceJet recorded incredible domestic load factors, making it the second highest (after Go Air), allowing the red airline to lead IndiGo in occupancy. Compared to Q1 FY13, the June domestic load factor in Q1 FY14 rose by 8.1% – or 107,466 passengers. If we assume all these passengers paid around INR 1,999, which means the airline took home a minimum of INR 1,500 (After UDF and ST), then the airline’s average yield (domestic) may have fallen by around INR 120, assuming an average passenger yield of INR 5,000 for regular sales. If one is to disregard the 10-lakh seats SpiceJet offered at INR 2013, which included travel in April 2013, then the promos in 2014 may have translated to a passenger revenue reduction of INR 37Cr, compared to Q1 FY13.

This does not mean the airline is losing money because of promo sales. Had these promos not been in place, the airline may have flown lesser passengers, taking a larger hit on its direct passenger revenue through lower sales and lesser stimulation. IndiGo, for instance, carried 687,000 more passengers in Q1 FY14 compared to last year, but added 1.24 million seats, leading to seat capacity deployment that was beyond demand.  But considering SpiceJet has managed to fly more passengers with lesser capacity, probably in part because of the changes within the airline- new service, better cleanliness, better service, improved frequency, better timings, and better on-time-performance, the airline may not have sold as many promo tickets as estimated, but probably sold more regular fare tickets, bettering the 37Cr estimate.

In addition, SpiceJet held 11 sales campaigns in Q1 FY- thanks to Avili who took over the role of CCO in Q1 FY14- of which all included flights in Q2 Fy14, and only three included few flights in Q1 FY14 (The Fly New Network sales). Since statistically, demand in Q2 of any FY is weaker, more seats were up for sales. With an approximate 3.75 million seats flown (offered) in each quarter, and conservatively assuming 10% of it was up for promo sales, more than 500,000 tickets may have been sold at an average price of INR 1,777, leading to an additional revenue of INR 100 Crore.

That 100CR sales were for tickets that need to be serviced in Q2 FY14 and beyond. This only means that the airline has sold more tickets than it has serviced in Q1 FY14, leading to more revenues from operations, while not incurring the costs associated with servicing those ticket sales.

With the flash sales triggering a market stimulation, approximately INR 10-50 Crore or more worth tickets may have been sold purely through stimulation.

Pushing the Demand Season

LF SG vs 6EThe flash sales have had two effects: shoring up capital, and destroying the notion of a season, proving that seasons are in the hands of the airline. June, which was to have been the onset of the off-season for domestic air travel, has recorded the best load factors, making it a lucrative month, and carrying fuller airplanes (on domestic) than IndiGo in the June of Q1 FY13.

The advent of Ancillaries

Part of SpiceJet’s rebranding was the commercial interest involved with the introduction of preferred seats (where passengers may pay higher for ‘Max’ seats which are the first few and emergency exit seats which either offer better legroom or promise faster boarding and deplaning), and the hot meals with TAJ SATS and CCD. The ancillaries from these introductions are pronounced in June 2014, as the hot meals were introduced towards the end of May of 2014. With these introductions, and the higher number of passengers flown, SpiceJet could have realized higher in-flight ancillary revenue in Q1 FY14 compared to Q1 FY13.

Financial Summary

P&L statementFor the Q1 of FY13, SpiceJet reported a profit of INR 50 Crores. One of the largest disproportionate expenses for the airline, in FY13, was maintenance: INR 993Cr, most of which was contributed to in H1 FY13. Over quarters, the maintenance cost averages to INR 250Cr. In Q1 FY13, the maintenance cost was INR 200 Cr. If the maintenance costs prevail, due to activities associated with aircraft being configured to lessor-return conditions, then compared to Q1 FY13, the maintenance cost overrun is INR 50Cr.

Although six Boeing 737s were withdrawn from operations, there were three extra 737s on the books, compared to Q1 FY13, which together add about INR 12Cr in lease over the three months, over Q1 FY13.

Compared to Q1 FY13, fuel prices in Q1 FY14 have risen by an average 10%, while ASKs have fallen by about 7%, resulting in a net fuel price increase of INR 17Cr.

Overall, flights in Q1 FY14 have fallen to 95% of that in Q1 FY13, resulting in airport charges reducing by about INR 5 Cr.

Flight crew salary hikes were not effected in Q1 FY14.

Cargo carried has gone up by 10% in Q1 FY14, contributing to INR 4 Cr of revenues over and above that in Q1 FY3.

Passengers in Q1 FY14 have dipped by 23,400 when compared to Q1 FY13. Assuming these passengers could have been regular fare paying passengers, the airline may have lost INR 11Cr. In addition, due to the promo fares, the airline may have lost INR 37Cr in the form of average yield reduction.

The lesser flights but higher passengers and cargo per flight translate to an average 500kg increase in payload, per flight, which introduces an average 0.65% fuel burn penalty, which translates to INR 5 Cr.

However, the airline may have shored up to around INR 150Cr from the sales in Q1 for services in Q2, and the market stimulation drive. With this, the airline may report a two digit profit (though we’d love to see three), and a single digit profit or a very modest and negligible loss, at worst. It must be noted that proceeds due to ancillaries haven’t been considered, which will increase profits. These profit/loss projects are very approximate, conservative, and willfully skip few other factors that influence cost, and may not hold true in case the airline paid off certain dues from previous quarters (if such rumors of unpaid dues are true)  in Q1 FY14, in which case the airline may slip into losses against the above projection.

If the company’s declared results are as analysed above, SpiceJet is on its way to a positive transformation. With all it’s heart.

As loads factors go up in May, so do hopes at SpiceJet. Q1 Loss imminent.

02 Wednesday Jul 2014

Posted by theflyingengineer in General Aviation Interest, Operations

≈ Leave a comment

Tags

2014, factors, Load, loss, May, Q1, Spicejet

Spicejet VT_SGF 737

LFSpiceJet’s load factor in the May of 2014 has touched 81.4%, its highest in two years since the May of 2012, and is the first month in this calendar year to beat the load factors witnessed by the airline last year. It beats the previous year’s load factors for the same month, by 0.5%.

While this is reassuring news, it must be noted that since 2010, May has been the month when SpiceJet witnesses its highest load factors. May and June are peak months for air travel, but it is only the second best period for IndiGo, which usually sees its best load factors in the month of December.

Statistically, SpiceJet’s load factors slip after May. Loads factors for the month of July are expected to be lower, but it is not known if they are lower than the previous year’s.

Effects of SpiceJet’s most significant market stimulation drive, the Re 1 fare sale which was held for the first three days of April, for travel between 01-July-2014 to 28-March- 2015, will be seen this month. Due to the sale, load factors are expected to go up, and according to the airline’s Chief Commercial Officer Kaneswaran Avili, the stimulation has yielded positive results in terms of higher non-promo fare bookings as well.

With these multiple promotional sales, any higher bookings are a mix of promo fares and regular fares. If the market has been sufficiently stimulated, which will reflect in higher load factors, then the airline will generate additional revenue. But if even after the stimulation, if the load factors rise only slightly, or not at all, it may not generate the airline any additional revenue. If load factors drop, which is highly unlikely, it is the death bell for the airline.

For example, SpiceJet’s Super Holi sale in March for travel between 14th April and 30th June 2014, and the Super Summer Sale in February for travel between April 1 and June 30, 2014, did not seem to have had an overall positive impact on the load factors for the months of April and May. Since the load factors were lower than the corresponding period in the previous year, it only meant that lesser people filled up the aircraft on average, and among that lesser set of passengers, even lesser actually paid a regular fare.

As shown in The Flying Engineer’s analysis of SpiceJet, there is a strong correlation between load factors and operational profits. Considering that (look at the graph) the load factors in April and May have resulted in an average load factor that is 0.6% lower than last year’s load factors for the same months, and that some of that passenger set bought sale/promotional fares and not regular fares, and that the factors in June are expected to dip (based on statistical trends), it may be likely that for the Q1 for Financial Year 2014, SpiceJet may report a loss.

But with the 0.5% in load factors in May, over last year’s, mild hopes are pinned on the second quarter of FY2104, which started yesterday. We do wish the airline all the very best, and hope to see it turnaround fast and strong, before the might of aggressively expanding TATA-SIA and AirAsia India, and the increasing capacity deployed by IndiGo and GoAir possibly choke the airline.

RNAV and RNP in India – Airways

07 Sunday Oct 2012

Posted by theflyingengineer in Flight Safety, Operations

≈ 17 Comments

Tags

AIPS, Air India, Air Traffic System, AIS, ANP, Delhi, ENR, Fuel Saving, ICAO, India, Indigo, Mumbai, Navigation, Q1, RNAV 5, RNP, W13N

Change in aviation is met with heavy resistance, and even a ten year old technology is considered relatively new. With the introduction of Performance Based Navigation (PBN) in the Indian Airspace, confusion still exists on RNAV (aRea NAVigation), RNP (Required Navigation Performance), and where this RNAV/RNP are implemented in the Indian ATS.

Waypoint LATID, seen as referenced to Bangalore International Airport’s VOR (BIA).
LATID = BIA/012deg/77NM or N14 28.6 E077 56.9

The basic airway system (in India and the world over) was constructed based on sensors: the VOR and the NDB stations and receivers on board the airplane, which provide the capability to fly to, or from a radio station along one of its “radials”. These radio stations are scattered, purposely, across the country, and the airway system is constructed by simply “connecting the dots”, and an aircraft’s position is always relative to one of these stations. Example: Waypoint LATID is 77NM from Bangalore International Airport’s VOR (BIA), on a radial of 012°of BIA.

When an aircraft’s navigation system has a little more intelligence: the ability to scan and receive signals from multiple such radio ground stations, or from self contained navigation aids, such as the Inertial Reference System (IRS), or from the globally available GPS satellite constellation, and determine the aircraft’s position in terms of the World Geodesic System 1984 (WGS-84) coordinates, it provides the ability to determine the aircraft’s absolute position, rather than referencing it to a sparse set of radio stations. Example: Waypoint LATID is N14° 28.6’ E077° 56.9’.

The advantage with absolute position is freedom in the lateral: an aircraft can determine its absolute position, and fly to another waypoint whose absolute position is known, without having to stick to a “radial” or a VOR station. The ability to fly “Direct-To” another waypoint from the present position offers an easily comprehendible advantage: fuel savings through shorter, more direct routes. This freedom in the lateral, and the ability to navigate freely in an area, gives rise to RNAV, or Area Navigation.

Indian airspace is comprised mostly of “W” routes, which are, as per AAI, exclusively available for domestic operators only. According to ICAO Annex 11, a “W” route is NOT an Area Navigation Route, which means, the airway is constructed with reference to ground radio beacons, and are mostly direct from one beacon to another.

The other airways in India are “A”, “B”, “G”, “L”, “M”, “N”, “P”, “Q”, “R”, “UL”, “UM”. Of these, “L”, “M”, “N”, “P” and “Q” are area navigation routes. This means that these routes are not constrained to fly between ground based radio stations, but are instead optimised, more direct routes that save fuel. The “Q” routes were recently introduced in 2012, in July.

Since flying these routes implies a reliance on the aircraft’s complex navigation system (which authorities have no operational control of) rather than the simpler ground referenced navigation system (which authorities maintain), it is imperative that in the interest of safety, the complex area navigation system be capable of a certain navigation accuracy, also termed the navigation performance.

Certain routes, and certain procedures may require a higher navigation accuracy and its associated certainty, while others may be less demanding. To quantify these “higher and lesser” accuracies, the term “Required Navigation Performance” (RNP) was introduced, which stipulates the minimum navigational accuracy that must be guaranteed, with a certainty of 95% availability.

With RNP, of the many requirements, the aircraft must be capable of displaying the Actual Navigation Performance (ANP). As long as the actual navigation performance is within the limits of the RNP, everyone’s happy. But if the ANP gets worse than the RNP, that’s when Air Traffic Control must be notified so they can keep  close eye on you and other airplanes in relation to your aircraft, and direct you based on conventional navigational practices.

The Area Navigation Routes – “L”, “M”, “N”, “P” – are all RNP 10 in India. The newly introduced “Q” routes, are all RNP 5. This means that your aircraft’s navigation accuracy must be better than 5 NM if it is to fly along the newly introduced 7 “Q” routes: Q1 – Q7. If however the ANP of the aircraft is 5.5 NM, then the accuracy is not enough to fly the “Q” routes, but accurate enough to fly thee RNP 10 routes: “L”, “M”, “N”, “P”.

Q1, W13N, and a Direct route as shown between Mumbai (BBB) and Delhi (DPN) VORs

The benefits of the RNP routes are evident. The newly introduced “Q” routes connect Delhi to Mumbai, Ahmedabad, Udaipur, and Vadodra. Picking “Q1”, which is Mumbai to Delhi (BBB- DPN), there are 13 waypoints in between the starting (BBB) VOR and the ending (DPN) VOR. Except for one, none of the other waypoints are ground based radio aids. The total ground distance between Mumbai and Delhi along Q1 is 633NM. The domestic non-RNAV “W13N” route between Mumbai and Delhi, has 5 waypoints in between, three of which are ground based radio aids (VOR). The ground distance along W13N is 653NM. A347, another non-RNAV route between Mumbai and Delhi, has 9 waypoints in between, three of which are ground based radio aids. The ground distance along A347 is 735NM. Compared to W13N and A347, Q1 saves 20NM and 102NM of ground distance, which translates to a saving of between 2 minutes and 14 minutes of flying time. A heavy Airbus A320, flying at FL350 at 76Tonnes, can save between 124 kg and 634 kg of fuel, which translates to a saving of between INR 11,000 and INR 56,227 per Mumbai-Delhi flight. Another advantage is the smooth flight path, as opposed to the zig-zag of non-RNAV routes.

Indigo’s 11 daily direct flights from Mumbai to the capital can save the airline about INR 1,21,000 per day, one way alone! Air India, with 12 direct flights, saves INR 1,32,000 one way, per day.

Aircraft with high navigation performance are allowed to fly the RNP routes. With higher accuracy, more airplanes can be squeezed on an airway. The “Q” routes allow aircraft to aircraft longitudinal separation of 50NM, while W13N allowed for a 10 minute separation, which translates to around 75NM. Theoretically, up to 13 airplanes may now fly on Q1, at any point of time, as compared to 9 on W13N. The capacity of the Indian Air Traffic System (ATS) has increased 44% on this route alone.

RNP and RNAV arrivals and departures are already in use, explained in another article which shall follow soon.

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