Everything about INS Kalvari

INS Kalvari

• INS Kalvari is a Scorpene-class submarine described as a “deadly predator”.

• It is one of six built by Mazagon Dock Limited in Mumbai as a part of Project-75 of the Indian Navy.

• Kalvariis a potent Man o’ War capable of undertaking offensive operations spanning across the entire spectrum of Maritime Warfare.

• Kalvari is named after a deep sea tiger shark and weighs about 1,600 tonnes.

• The state-of-the-art features of the Scorpenes include superior stealth and ability to launch crippling attacks with precision-guided weapons.

• The boat also has two 1250 kW MAN diesel engines for rapidly charging batteries.

• The submarine boasts of a highly advanced Combat Management System and a sophisticated Integrated Platform Management System.

• India has just about 15 submarines, a mix of Russian-origin Kilo-class vessels and German HDW submarines.


Everything about Missiles

What is a missile?

  • A missile is essentially a sophisticated bomb which after being released is governed by the laws of ballistics.
  • The laws of ballistics means only the force of gravity acts upon it.
  • It can be made more accurate and faster by attaching a propulsion system to the bomb and then it is called a rocket.
  • If guided and controlled, a rocket can be made deadlier and that is what a missile is.
  • The missiles can carry tons of nuclear warheads at speeds way higher than fighter planes.


Missiles are classified variously based on the launching system. Thus, missiles can be:

  • Surface-to-Surface Missile
  • Surface-to-Air Missile
  • Surface (Coast)-to-Sea Missile
  • Air-to-Air Missile
  • Air-to-Surface Missile
  • Sea-to-Sea Missile
  • Sea-to-Surface (Coast) Missile

Based on the working principle, missiles can be:

  • Ballistics
  • Cruise

Classified by range and proposed use, missiles can be:

  • Short RMedium RaIntermediate RangeMissile
  • Intercontinental Ballistic Missile

How is a ballistic missile different from a cruise one?

  • A ballistic missile is used to hit a predetermined target —launched such that it burns most of its fuel to attain the desired velocity in the first phase (also called the boost phase).
  • Such a missile can only be guided during the powered phase of flight.
  • 31 countries have operational ballistic missile systems.
  • India’s Agni and Prithvi are ballistic missile.
  • A cruise missile is a small pilotless craft that carries an explosive warhead.
  • It has wings and an engine, but is built more economically.
  • It is steered by inertial navigation system (INS), that’s also used by airplanes.
  • A cruise missile can be made so accurate that it can be aimed at any specific place like a door or a window.
  • Its flight can be guided for a longer period.
  • BrahMos is a cruise missile system.

Intercontinental Ballistic Missile

  • Ballistic missiles are categorised according to their range, which is the maximum distance along the surface of the earth from the point of launch to the point of impact of its payload.
  • Until recently, Russia, US, China, the UK, France and Israel were the only countries with operational ICBM technology.
  • With Hwasong-15, North Korea’s joined this club.
  • With over 5,000-km range, India’s Agni-V also qualifies for this club.

Which countries have the longest range of operational ballistic missiles?

Russia, US and China have many missile systems that qualify for the ICBM range.

Everything about Aerial Refueling

Air to air refuelling

  • It is also known as Aerial refuelling, air refuelling, in-flight refuelling and tanking.
  • It is the process of transferring aviation fuel from one military aircraft to another during flight.
  • During air-to-air refuelling, both aircraft must maintain accurate flying parameters.

The two main refuelling systems are:

  1. Probe-and-drogue: It requires exceptional flying skills as the receiving aircraft has to accurately insert the receptacle probe into the basket-shaped drogue trailing the tanker aircraft. This method is practiced by IAF’s pilots.
  2. Flying boom: It is complex as it requires a dedicated boom operator system. But in this system, fuel is transferred at the faster speed.

Advantages of in flight refuelling

  • It gives the receiving aircraft the capacity to fly for longer duration.
  • It has given a tremendous boost to the IAF’s operational capability.

Embraer transport aircraft

  • It is a twin engine regional jet produced by Embraer, a Brazilian aerospace company.
  • IAF has mounted indigenous Airborne Early Warning and Control (AEW&C) system ‘Netra’ on it.


  • It is an Airborne Early Warning and Control system.
  • It is developed by the Defence Research and Development Organisation.
  • It has been inducted in IAF in February this year.
  • Its three systems are being built and will be based at Bhatinda, facing the western border.
  • It gives a 240-degree coverage of airspace.

Airborne Early Warning and Control

  • It is also called eye-in-the-sky.
  • It is an airborne radar picket system designed to detect aircraft, ships and vehicles at long ranges and perform command and control of the battle space in an air engagement by directing fighter and attack aircraft strikes.
  • It is capable of long-range surveillance and a force multiplier.

Everything about World Malaria Report 2017 by WHO

The global figures

• The report shows that there were 5 million more malaria cases in 2016 than in 2015.

• The estimated global tally of malaria deaths reached 445,000 in 2016 compared to 446,000 the previous year.

• The African Region continues to bear an estimated 90% of all malaria cases and deaths worldwide.

• About 80% of the deaths were accounted for by 15 countries, namely India and 14 countries in Sub-Saharan Africa.

India specific findings

• India accounts for 6% of global malaria cases and 7% of the total deaths are caused by it.

• The WHO figures also suggest that India is unlikely to reduce its case burden beyond 40% by 2020.


• Maldives, Sri Lanka and Kyrgyzstan achieved malaria-free status in 2015 and 2016 respectively.

Major impediments in eliminating malaria front in India are:

1.Weak surveillance system: India and Nigeria were able to detect only 8% and 16% of cases respectively by using their detection system.

• These two are major contributors to the global burden of malaria.

2. Resistance to chloroquine: In India, cases of plasmodium vivax were also traced.

• It is the milder cousin of the p. Falciparum.

• This can be due be resistance to chloroquine which is the first line treatment to p. vivax infections.

3. Low funding and resistance: Due to low funding per person at risk and resistance to certain frontline insecticides, India is only expected to achieve a 20%-40% reduction.

Target 2020

• WHO Global Technical Strategy for Malaria has called for reductions of at least 40% in malaria cases incidence and mortality rates by the year 2020.

Problem in achieving the target

• According to the latest malaria report, the world is not on track to reach these critical milestones.

• A major problem is insufficient funding at both domestic and international levels.

• Around US$ 2.7 billion was invested in malaria control and elimination efforts globally in 2016.

• This is well below to meet the targets of WHO global malaria strategy.

• This results in major gaps in coverage of insecticide-treated nets, medicines and other life-saving tools.

Controlling malaria

• In most malaria-affected countries, the most common and effective ways to prevent malarial infection are the followings:

1 Sleeping under an insecticide-treated bed net (ITN)

2 Spraying the inside walls of homes with insecticides

3 Artemisinin-based combination therapies are the most effective in controlling malarial cases

A wake-up call

• World is at the crossroads in the response to malaria.

• WHO is hoping that this report will serve as a wake-up call for the global health communities. Meeting the global malaria targets will only be possible through greater investment and expanded coverage of core tools that prevent, diagnose and treat malaria.

• Robust financing for the research and development of new tools is equally critical.

Everything about Umang App (Unified Mobile Application for New-age Governance (UMANG)

Umang (Unified Mobile Application for New-age Governance (UMANG) app:

• It is a unified app to serve e-governance through mobile devices.

• It is developed by the Ministry of Electronics and Information Technology (MeitY) and National e-Governance Division (NeGD).

• It is to offer services of the central, state, local bodies and various government agencies right on Android and iOS based mobile devices.

• It will provide over a hundred citizen-centric services.

• At the back-end, these services will be catered for by many different departments of the Union and State Governments.

• This integrated approach will add an automatic layer of ‘peer performance pressure’, in the working of these departments.

List of services:

• The Umang app bundles a list of Digital India services, including Aadhaar, DigiLocker and PayGov.

• The app provides citizens with all the major government services provided through app, web, SMS and IVR channels.

• The citizens can use the app to access their income tax filing, LPG cylinder bookings and Provident Fund account.

• Parents can use the Umang app to access CBSE results.

Multilingual support:

• The app has multilingual support with as many as 13 languages and includes a payment-based transaction access.

Social media integration

• The app has social media integration that allows to connect your Facebook, Google, and Twitter accounts and enable one-touch login process.

• The interface of the Umang app appears to be convenient for novices.

• The app comes with features like favourites and push notification alerts.



  • It is an ultra-cool dwarf star about 40 light years away, located in the constellation Aquarius.
  • It is named after the telescope that discovered this system – TRAPPIST (Transiting Planets and Planetesimals Small Telescop) in Chile.
  • The planets have sizes and masses comparable to the Earth and Venus.
  • It is an ultra-cool star (unlike our sun). Therefore, liquid water could survive on planets very close to it as well.
  • All 7 planetary orbits are closer to their host star than Mercury is to our sun. The planets are very close to each other.
  • Based on their densities, the planets of this system are likely to be rocky.
  • The TRAPPIST-1 star is quite old: between 5.4 and 9.8 billion years. This is up to twice as old as our own solar system, which formed some 4.5 billion years ago.
  • Since it is a low mass star, the temperature and brightness almost remains constant. Therefore, it is expected to live 900 times longer than the current age of the universe – 13.7 billion years.



  • Dhruv has been indigenously designed and developed by the HAL, and is powered by the Shakti engine jointly developed with Turbomeca of France.
  • It is a twin engine, multi-role, multi-mission new generation helicopter.
  • It is superior to the other helicopters used by the Army such as Cheetah and Chetak, both of which have single engine.
  • It has been exported to several countries in the region.
  • As a part of military diplomacy, India has offered it to several friendly countries in the neighbourhood and South-East Asia.