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Basic AVSEC practice questions

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Question 1Aviation security context, legal framework and conventions

Which organization adopted the Convention on International Civil Aviation, commonly known as the Chicago Convention?

  1. The International Air Transport Association
  2. The International Maritime Organization
  3. The International Civil Aviation Organization Correct answer.
  4. The United Nations Security Council

Explanation

The Chicago Convention was concluded in 1944 and established the framework for international civil aviation, with ICAO created as its governing body. IATA is an industry association, not the treaty's adopting body.

Question 2Aviation security context, legal framework and conventions

The Chicago Convention was signed in which city and year?

  1. Warsaw, 1929
  2. Chicago, 1944 Correct answer.
  3. Montreal, 1947
  4. Tokyo, 1963

Explanation

The Convention on International Civil Aviation was signed in Chicago in 1944, which is why it is called the Chicago Convention. Montreal hosts ICAO headquarters but is associated with later treaties such as the 1971 Convention.

Question 3Aviation security context, legal framework and conventions

What is the principal purpose of Annex 17 to the Chicago Convention?

  1. Regulating the carriage of dangerous goods
  2. Setting standards and recommended practices for safeguarding civil aviation against acts of unlawful interference Correct answer.
  3. Standardizing aircraft noise certification
  4. Harmonizing air traffic control phraseology

Explanation

Annex 17 establishes the Security Convention's implementing standards and recommended practices for protecting civil aviation against unlawful interference. Other annexes address environmental, cargo and operational matters.

Question 4Aviation security context, legal framework and conventions

The Convention on the Suppression of Unlawful Acts against the Safety of Civil Aviation, signed in 1971, is commonly known by which name?

  1. The Hague Convention
  2. The Tokyo Convention
  3. The Beijing Convention
  4. The Montreal Convention Correct answer.

Explanation

The 1971 Montreal Convention addresses unlawful acts against the safety of civil aviation, such as sabotage and attacks on aircraft. It is distinct from the 1999 Montreal Convention on carrier liability.

Question 5Aviation security context, legal framework and conventions

The Hague Convention of 1970 primarily addresses which offence?

  1. Unlawful seizure of aircraft Correct answer.
  2. Damage to cargo in transit
  3. Carriage of unruly passengers
  4. Sabotage of airport facilities

Explanation

The 1970 Hague Convention deals with the unlawful seizure of aircraft, commonly known as hijacking, and requires states to establish jurisdiction and prosecute or extradite offenders.

Question 6Aviation security context, legal framework and conventions

Under the Chicago Convention, each contracting state retains what kind of authority over the airspace above its territory?

  1. Conditional authority held by airlines
  2. Shared authority with neighbouring states
  3. Delegated authority exercised by ICAO
  4. Complete and exclusive sovereignty Correct answer.

Explanation

Article 1 of the Chicago Convention affirms that states have complete and exclusive sovereignty over the airspace above their territory. This principle underpins the need for bilateral agreements for international services.

Question 7Aviation security context, legal framework and conventions

Which body within ICAO is responsible for adopting and amending the Annexes to the Chicago Convention?

  1. The Assembly
  2. The Legal Committee
  3. The Air Navigation Commission
  4. The Council Correct answer.

Explanation

The ICAO Council, a permanent governing body of limited membership, adopts and amends Annexes using the procedure set out in Article 90 of the Convention. The Assembly is the sovereign body but does not adopt Annexes.

Question 8Aviation security context, legal framework and conventions

Which term describes the principle that a state may exercise criminal jurisdiction over offences committed on board an aircraft registered in that state?

  1. Port state jurisdiction
  2. Coastal state jurisdiction
  3. Flag state jurisdiction Correct answer.
  4. Transit state jurisdiction

Explanation

The state of registration of an aircraft is often called the flag state, and it may exercise jurisdiction over offences committed on board. This principle is reflected in the Tokyo Convention.

Question 9Aviation security context, legal framework and conventions

A passenger becomes violent and assaults a crew member during a flight from State A to State B on an aircraft registered in State C. Under the Tokyo Convention, which state is best placed to exercise jurisdiction over the offence?

  1. The state of nationality of the victim
  2. State C, as the state of registration Correct answer.
  3. State A, as the state of departure
  4. State B, as the state of destination

Explanation

The Tokyo Convention recognizes the state of registration of the aircraft as the primary state entitled to exercise jurisdiction over offences committed on board. Other states may also have grounds, but registration is the foundational basis.

Question 10Aviation security context, legal framework and conventions

Under the Tokyo Convention, what power does the aircraft commander have regarding a person who is about to commit an offence on board?

  1. The commander may impose a fine payable on arrival
  2. The commander may only issue a verbal warning
  3. The commander may take reasonable measures, including restraint, to protect safety Correct answer.
  4. The commander must await instructions from the destination state

Explanation

The Tokyo Convention empowers the aircraft commander to take reasonable measures, including restraint, against a person who commits or is about to commit an offence, when necessary to protect the safety of the aircraft or persons on board.

Question 11Aviation security context, legal framework and conventions

The 1988 Protocol to the Montreal Convention extended the scope of unlawful acts to include which activity?

  1. Unlawful acts at international airports serving civil aviation Correct answer.
  2. Unlawful seizure of ships
  3. Smuggling of wildlife
  4. Interference with satellite navigation

Explanation

The 1988 Supplementary Protocol to the Montreal Convention extended the framework to acts of violence at airports serving international civil aviation. It addressed attacks in terminal and apron areas.

Question 12Aviation security context, legal framework and conventions

Which ICAO instrument is a recommended practice under Annex 17 concerning the screening of passengers and their cabin baggage?

  1. Screening is discretionary for all flights
  2. Screening must be applied to passengers and cabin baggage before boarding Correct answer.
  3. Screening is required only on flights exceeding four hours
  4. Screening applies only to hold baggage

Explanation

Annex 17 requires that passengers and their cabin baggage be screened prior to boarding to prevent prohibited items from entering the security-restricted area. Screening is not discretionary and is not limited by flight duration.

Question 13Aviation security context, legal framework and conventions

A contracting state decides it cannot comply with a newly adopted Annex 17 standard. What must it do under the Chicago Convention?

  1. Request other states to apply the standard on its behalf
  2. Immediately suspend all international flights
  3. Notify ICAO of the difference between its practice and the standard Correct answer.
  4. Amend the standard through its national legislature

Explanation

Article 38 of the Chicago Convention requires a state that finds it impracticable to comply with a standard to notify ICAO of the differences between its own practice and the international standard.

Question 14Aviation security context, legal framework and conventions

What is the legal status of a 'Recommended Practice' in an ICAO Annex?

  1. It is legally binding on all contracting states
  2. It is a non-binding guidance that states are encouraged to follow Correct answer.
  3. It is enforceable only by the airline's flag carrier
  4. It applies only to states that have signed a bilateral agreement

Explanation

A Recommended Practice is a non-binding provision that states are encouraged to implement, unlike a Standard which is binding unless a difference is filed. Both appear in Annexes but differ in legal force.

Question 15Aviation security context, legal framework and conventions

Which offense is covered by the 2010 Beijing Convention but not by the original 1971 Montreal Convention?

  1. Using an aircraft as a weapon to cause death or destruction Correct answer.
  2. Committing an act of violence at an airport
  3. Destroying an aircraft in service
  4. Placing a bomb in checked baggage

Explanation

The Beijing Convention and Protocol modernized the framework to address new threats, including using an aircraft as a weapon and related cyber and biological threats. The 1971 Montreal Convention predates these concepts.

Question 16Aviation security context, legal framework and conventions

Under the Chicago Convention, what is required for an aircraft of one contracting state to operate scheduled international air services over the territory of another?

  1. Notification to the United Nations
  2. Automatic rights under Article 1
  3. Special permission or other authorization from the other state Correct answer.
  4. Approval from the airline's home airport authority

Explanation

Article 6 of the Chicago Convention provides that scheduled international air services may not be operated over or into the territory of a contracting state except with special permission or other authorization. Such rights are typically granted through bilateral air services agreements.

Question 17Aviation security context, legal framework and conventions

What is the role of a state's National Civil Aviation Security Committee under Annex 17?

  1. To issue passports to aviation workers
  2. To operate airport screening equipment directly
  3. To coordinate security policy and advise on implementation across government and industry Correct answer.
  4. To investigate aircraft accidents

Explanation

Annex 17 envisages a national committee to coordinate security policy and ensure effective implementation among government agencies and industry stakeholders. It is a policy coordination body, not an operational screening unit.

Question 18Aviation security context, legal framework and conventions

A person is found carrying a weapon in the security-restricted area of an airport in State A, having boarded a flight originating in State B. Which legal framework most directly provides for jurisdiction and prosecution?

  1. The Montreal Convention of 1971 and its 1988 Protocol Correct answer.
  2. The Chicago Convention's Annex 6
  3. The Convention on the Law of the Sea
  4. The Warsaw Convention

Explanation

The 1971 Montreal Convention and its 1988 Protocol address unlawful acts against civil aviation, including at airports, and establish jurisdiction and prosecution obligations. The Warsaw Convention deals with liability for carriage, not security offences.

Question 19Aviation security context, legal framework and conventions

Which ICAO document provides guidance to states on implementing Annex 17 and the security-related provisions of the Convention?

  1. The Air Traffic Services Manual (Doc 9426)
  2. The Accident Investigation Manual (Doc 9756)
  3. The Dangerous Goods Regulations
  4. The Security Manual for Safeguarding Civil Aviation (Doc 8973) Correct answer.

Explanation

ICAO Doc 8973, the Security Manual, provides comprehensive guidance to states on implementing aviation security measures consistent with Annex 17. The other documents address different operational domains.

Question 20Aviation security context, legal framework and conventions

Which principle limits a state's exercise of jurisdiction over an offence committed on board a foreign-registered aircraft that is in flight over the high seas?

  1. The state of departure has exclusive jurisdiction
  2. No state may exercise jurisdiction over the high seas
  3. The state of registration has primary jurisdiction, though other states may act under specific circumstances Correct answer.
  4. The state of registration always has exclusive jurisdiction

Explanation

Under the Tokyo Convention, the state of registration has primary jurisdiction, but other states may exercise jurisdiction in defined circumstances such as threats to their security or breaches of their laws. Jurisdiction is not necessarily exclusive.

Question 21Aviation security context, legal framework and conventions

An airport operator in State A discovers that a contractor has breached security procedures, and the state wishes to enforce compliance. Which is the most appropriate legal basis under the aviation security framework?

  1. The Tokyo Convention's commander authority
  2. The state's national civil aviation security programme and regulations implementing Annex 17 Correct answer.
  3. The Chicago Convention's Annex 6 operational standards
  4. The Warsaw Convention's liability provisions

Explanation

Annex 17 requires states to establish a national civil aviation security programme, and enforcement against contractors is typically carried out under national regulations implementing that programme. Annex 6 and the liability conventions do not provide the enforcement mechanism.

Question 22Aviation security context, legal framework and conventions

What distinguishes the legal effect of a Standard in an ICAO Annex from a Recommended Practice?

  1. Standards are binding unless a difference is notified, while Recommended Practices are non-binding Correct answer.
  2. Standards are adopted by the Assembly, while Recommended Practices are adopted by airlines
  3. Standards are optional, while Recommended Practices are mandatory
  4. Standards apply only to airlines, while Recommended Practices apply to states

Explanation

ICAO Standards are binding on contracting states unless the state files a difference under Article 38, whereas Recommended Practices are desirable measures that states are encouraged to implement. The distinction is central to understanding Annex obligations.

Question 23Aviation security context, legal framework and conventions

A state wishes to prosecute an alleged hijacker found in its territory but has no extradition treaty with the state of the aircraft's registration. Under the Hague Convention, what is the state's obligation?

  1. It may release the offender if no extradition treaty exists
  2. It must submit the case for prosecution if it does not extradite Correct answer.
  3. It must transfer the case to ICAO
  4. It must extradite the offender regardless of its national law

Explanation

The Hague Convention follows an extradite-or-prosecute principle: if the state does not extradite the alleged offender, it must submit the case to its competent authorities for prosecution, regardless of the absence of an extradition treaty.

Question 24Aviation security context, legal framework and conventions

Which statement best describes the relationship between Annex 17 and a state's national civil aviation security programme?

  1. The national programme implements Annex 17 standards and recommended practices within national law and practice Correct answer.
  2. The national programme applies only to foreign carriers
  3. Annex 17 supersedes national law in all cases
  4. The national programme replaces Annex 17 for domestic flights only

Explanation

Annex 17 sets international standards and recommended practices, which states implement through their national civil aviation security programmes and associated regulations. The Annex does not supersede national law but is given effect through it.

Question 25Aviation security context, legal framework and conventions

A state amends its aviation security law to permit warrantless searches of passengers at airports. Which framework element most directly governs whether such measures are consistent with international obligations?

  1. The Tokyo Convention's commander authority
  2. The Chicago Convention's Article 1 sovereignty principle alone
  3. The state's obligations under Annex 17 and applicable human rights and national constitutional law Correct answer.
  4. The Warsaw Convention's liability limits

Explanation

Annex 17 requires security measures, but their implementation must also respect national constitutional and human rights obligations. International aviation security standards do not override fundamental legal protections.

Question 26Aviation security context, legal framework and conventions

Which international convention is the primary legal framework for aviation security and is supplemented by Annex 17 to the Chicago Convention?

  1. The Hague Convention of 1970
  2. The Montreal Convention of 1971
  3. The Chicago Convention of 1944 Correct answer.
  4. The Tokyo Convention of 1963

Explanation

The Chicago Convention, formally the Convention on International Civil Aviation, establishes the core principles for international civil aviation and provides the legal basis for ICAO and its Annexes, including Annex 17 on security. The other conventions address specific offences or liability but are not the overarching framework.

Question 27Aviation security context, legal framework and conventions

Under the Chicago Convention, what is the status of the security-related Standards and Recommended Practices (SARPs) contained in Annex 17?

  1. They are binding on all contracting states without exception.
  2. They are binding unless a state notifies ICAO of a difference. Correct answer.
  3. They apply only to states that have signed a separate security agreement.
  4. They are advisory only and states may choose whether to implement them.

Explanation

Annexes to the Chicago Convention are adopted by the ICAO Council and become binding on contracting states, but a state may notify ICAO of any differences between its national regulations and the international standards. Recommended Practices, however, are not binding. This principle ensures flexibility while maintaining global harmonization.

Question 28Aviation security context, legal framework and conventions

A contracting state decides to implement a security measure that is more stringent than an Annex 17 Standard. Is this permissible under the Chicago Convention?

  1. No, states may only implement measures that are less stringent.
  2. No, states must implement exactly the same measures as in the Annex.
  3. Yes, provided the state notifies ICAO of the difference. Correct answer.
  4. Yes, but only if the measure is approved by the ICAO Council.

Explanation

The Chicago Convention allows contracting states to adopt measures that are more stringent than the international Standards, as long as they notify ICAO of any differences between their national regulations and the international Standards. This notification ensures transparency and helps other states understand the operating environment. The ICAO Council does not need to approve such measures.

Question 29Aviation security context, legal framework and conventions

Which of the following best describes the legal obligation of a contracting state under the Chicago Convention regarding the adoption of security measures for its airports?

  1. States must delegate security responsibilities to the airport operator without state oversight.
  2. States must implement the security measures recommended by airlines operating in their territory.
  3. States must ensure that security measures are applied to all flights, including domestic ones.
  4. States must adopt and enforce security measures that are at least as stringent as the Annex 17 Standards. Correct answer.

Explanation

Under the Chicago Convention and Annex 17, each contracting state is responsible for ensuring that security measures are applied to international civil aviation. This includes adopting and enforcing regulations that meet or exceed the Standards, and maintaining state oversight. The state cannot simply delegate this responsibility without retaining ultimate authority.

Question 30Aviation security context, legal framework and conventions

In the context of the Chicago Convention, what is the effect of a state filing a difference with respect to an Annex 17 Standard?

  1. The state is exempt from the Standard but must inform other states of the difference. Correct answer.
  2. The state is required to withdraw from the Convention.
  3. The Standard is automatically amended for all states.
  4. The Standard ceases to apply to that state entirely.

Explanation

When a state files a difference, it indicates that its national regulations do not fully comply with an international Standard. The state is not exempt from the obligation to notify, but the difference is published by ICAO so that other states are aware. The Standard remains in force for other states and is not amended or suspended.

Question 31Threats to civil aviation and security risk management

Which term describes the unlawful seizure of an aircraft by force, threat, or intimidation while it is in flight or on the ground?

  1. Unlawful interference
  2. Air piracy
  3. Sabotage
  4. Hijacking Correct answer.

Explanation

Hijacking (unlawful seizure of aircraft) is the specific act of taking control of an aircraft by force, threat, or intimidation. It is one of the classic categories of unlawful interference against civil aviation.

Question 32Threats to civil aviation and security risk management

In risk management, what does the term 'likelihood' refer to when assessing a threat against aviation operations?

  1. The severity of the consequences if an attack succeeds
  2. The probability that a threat will attempt to exploit a vulnerability Correct answer.
  3. The cost of implementing a security control
  4. The number of security staff on duty

Explanation

Likelihood expresses the probability or chance that a threat event will occur or succeed against a target. Consequence, by contrast, measures the impact if it does occur. Together they form the basis of a risk assessment.

Question 33Threats to civil aviation and security risk management

A passenger places a bag containing an improvised explosive device in an airport terminal and leaves the area. Which threat category does this represent?

  1. Bomb threat and unlawful interference Correct answer.
  2. Cyber intrusion
  3. Perimeter breach
  4. Internal collusion

Explanation

Placing an explosive device in a public area is an unlawful interference act involving a bomb threat. It targets people and infrastructure and is handled through bomb threat response procedures and screening.

Question 34Threats to civil aviation and security risk management

Which document establishes international legal standards for the suppression of unlawful seizure of aircraft?

  1. The Hague Convention of 1970 Correct answer.
  2. The Chicago Convention of 1944
  3. The Tokyo Convention of 1963
  4. The Montreal Protocol of 1988

Explanation

The Hague Convention of 1970 specifically addresses the unlawful seizure of aircraft and obliges states to establish jurisdiction and prosecute offenders. The Tokyo Convention deals with offences on board, and the Chicago Convention governs general aviation law.

Question 35Threats to civil aviation and security risk management

An airport security manager identifies that a single screening lane serves both staff and passengers during peak hours, creating congestion. Which risk management step follows identification of this vulnerability?

  1. Conduct a threat and vulnerability assessment to evaluate the risk Correct answer.
  2. Reduce the number of screening staff
  3. Publish the finding to the public
  4. Immediately close the terminal

Explanation

After a vulnerability is identified, the next step is a structured threat and vulnerability assessment to determine the likelihood and impact of exploitation. This informs proportionate mitigation measures.

Question 36Threats to civil aviation and security risk management

Which of the following best describes an 'insider threat' in civil aviation?

  1. A drone operator flying near an approach path
  2. A passenger who becomes disruptive during boarding
  3. A person with legitimate access who misuses that access to cause harm Correct answer.
  4. A hacker probing an airline website

Explanation

An insider threat originates from someone with authorized access, such as staff or contractors, who exploits that position to compromise security. The defining feature is legitimate access being misused.

Question 37Threats to civil aviation and security risk management

In a risk matrix, a threat rated as high likelihood and high consequence is typically treated how?

  1. Prioritized for immediate mitigation Correct answer.
  2. Accepted without further action
  3. Transferred to passengers
  4. Monitored only annually

Explanation

High likelihood combined with high consequence produces a high or critical risk rating, which requires priority mitigation. Acceptance, monitoring, or transfer are inappropriate for such elevated risk.

Question 38Threats to civil aviation and security risk management

Which of the following is an example of a cyber threat to aviation security?

  1. A vehicle crossing a perimeter gate
  2. A passenger carrying a prohibited item
  3. An unattended bag in a departure lounge
  4. Ransomware attacking an airline's reservation system Correct answer.

Explanation

Ransomware is malicious software that targets information systems, making it a cyber threat. The other options are physical security threats.

Question 39Threats to civil aviation and security risk management

What is the primary purpose of a security risk assessment at an airport?

  1. To identify threats, vulnerabilities, and consequences to inform proportionate controls Correct answer.
  2. To calculate the airport's annual profit
  3. To schedule aircraft maintenance
  4. To determine ticket prices

Explanation

A security risk assessment systematically identifies threats and vulnerabilities and evaluates consequences so that controls can be proportionate and targeted. It is a decision-support tool, not a commercial or maintenance function.

Question 40Threats to civil aviation and security risk management

A threat actor with no authorized access attempts to enter a restricted airside area by following a badge-holder through a door. What is this tactic called?

  1. Tailgating Correct answer.
  2. Phishing
  3. Shoulder surfing
  4. Collusion

Explanation

Tailgating (or piggybacking) is the act of following an authorized person through a controlled door without presenting valid credentials. It exploits access control weaknesses at entry points.

Question 41Threats to civil aviation and security risk management

Which of the following best describes 'sabotage' as a threat to civil aviation?

  1. An unauthorized drone flight
  2. Deliberate damage or destruction of an aircraft or facility to cause harm Correct answer.
  3. A false bomb threat call
  4. A protest held outside an airport terminal

Explanation

Sabotage is the deliberate act of damaging or destroying aircraft, facilities, or equipment to cause harm or disruption. It is distinct from protests, hoaxes, and unauthorized drone operations.

Question 42Threats to civil aviation and security risk management

Under a typical risk management model, what does 'risk treatment' involve?

  1. Documenting threats only after an incident
  2. Ignoring risks that are difficult to measure
  3. Selecting and applying measures to reduce, avoid, transfer, or accept risk Correct answer.
  4. Removing all security controls to save cost

Explanation

Risk treatment is the process of choosing and implementing options such as mitigation, avoidance, transfer, or acceptance to bring risk to an acceptable level. It follows assessment and precedes monitoring.

Question 43Threats to civil aviation and security risk management

A ground handler reports that a contractor with airside access has been asking unusual questions about cargo schedules. Which threat indicator does this most likely represent?

  1. A routine customer inquiry
  2. A perimeter fence failure
  3. A cyber attack in progress
  4. Potential insider threat reconnaissance Correct answer.

Explanation

Unusual probing about sensitive schedules by someone with access is a classic insider threat indicator warranting reporting and review. Security awareness programs teach staff to recognize and report such behavior.

Question 44Threats to civil aviation and security risk management

Which factor most directly increases the likelihood of a successful attack against an airport?

  1. Frequent staff training exercises
  2. Well-maintained perimeter fencing
  3. High passenger satisfaction scores
  4. An unmitigated vulnerability that a capable threat actor can exploit Correct answer.

Explanation

Risk increases when a capable threat actor can exploit an unmitigated vulnerability. Effective controls such as training and fencing reduce likelihood, while satisfaction scores are irrelevant to security risk.

Question 45Threats to civil aviation and security risk management

What is the purpose of the threat level concept used by aviation security authorities?

  1. To set passenger baggage weight limits
  2. To determine the number of flights per day
  3. To rank airlines by profitability
  4. To communicate the current assessed level of threat so that proportionate measures can be applied Correct answer.

Explanation

Threat levels communicate the assessed threat so that security measures can be scaled proportionately. Higher threat levels typically trigger additional or heightened measures.

Question 46Threats to civil aviation and security risk management

Which of the following best describes the 'consequence' component of a security risk assessment?

  1. The potential impact on people, assets, and operations if a threat succeeds Correct answer.
  2. The cost of a screening machine
  3. The number of security checkpoints
  4. The chance that a threat will occur

Explanation

Consequence measures the potential harm or impact on people, assets, and operations if a threat event occurs. It is assessed alongside likelihood to determine overall risk.

Question 47Threats to civil aviation and security risk management

An airport introduces random explosive trace detection checks in addition to standard screening. Which risk management principle does this best illustrate?

  1. Transfer of risk to insurers
  2. Elimination of all risk
  3. Layered, unpredictable measures to deter and detect threats Correct answer.
  4. Acceptance of residual risk

Explanation

Random, layered measures add unpredictability and increase the chance of detecting a threat that might evade a single layer. This reflects defense-in-depth and deterrence principles rather than risk elimination or transfer.

Question 48Threats to civil aviation and security risk management

Which of the following is a recognized category of threat to civil aviation?

  1. Changes in currency exchange rates
  2. Chemical, biological, radiological, and nuclear (CBRN) threats Correct answer.
  3. Airline advertising campaigns
  4. Seasonal weather delays

Explanation

CBRN threats are a recognized category of unlawful interference and terrorism risk against aviation. Currency, weather delays, and advertising are not security threat categories.

Question 49Threats to civil aviation and security risk management

A risk is assessed as low likelihood but very high consequence. What is a reasonable risk management approach?

  1. Accept it fully with no contingency planning
  2. Apply mitigation and contingency planning proportionate to the severe potential impact Correct answer.
  3. Focus only on high-likelihood risks
  4. Ignore it because likelihood is low

Explanation

Low-likelihood but high-consequence risks still require mitigation and contingency planning because the impact could be catastrophic. Risk management weighs both dimensions rather than likelihood alone.

Question 50Threats to civil aviation and security risk management

How does 'defense in depth' contribute to aviation security?

  1. It uses multiple independent layers so the failure of one control does not defeat overall security Correct answer.
  2. It replaces all human screening with automation
  3. It removes redundancy to save costs
  4. It relies on a single very strong control

Explanation

Defense in depth stacks independent controls so that if one layer fails, others still provide protection. This redundancy is central to resilient aviation security design.