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Situational Awareness

in Emergency Operations

Situational awareness (SA) is not simply a mental picture of aircraft location; rather, it is an overall assessment of each element of the environment and how it affects a flight. On one end of the SA spectrum is a pilot who is knowledgeable of every aspect of the flight; consequently, this pilot’s decision-making is proactive. With good SA, this pilot is able to make decisions well ahead of time and evaluate several different options. On the other end of the SA spectrum is a pilot who is missing important pieces of the puzzle: “I knew exactly where I was when I ran out of fuel.” Consequently, this pilot’s decision-making is reactive. With poor SA, a pilot lacks a vision of future events and is forced to make decisions quickly, often with limited options.


During a typical IFR flight, a pilot operates at varying levels of SA. For example, a pilot may be cruising to his or her destination with a high level of SA when ATC issues an unexpected standard terminal arrival route (STAR). Since the pilot was not expecting the STAR and is not familiar with it, SA is lowered. However, after becoming familiar with the STAR and resuming normal navigation, the pilot returns to a higher level of SA.

Factors that reduce SA include: distractions, unusual or unexpected events, complacency, high workload, unfamiliar situations, and inoperative equipment. In some situations, a loss of SA may be beyond a pilot’s control. For example, a pneumatic system failure and associated loss of the attitude and heading indicators could cause a pilot to find his or her aircraft in an unusual attitude. In this situation, established procedures must be used to regain SA.

Pilots should be alert to a loss of SA anytime they are in a reactive mindset. To regain SA, reassess the situation and seek additional information from other sources, such as the navigation instruments or ATC.

Summary

Electronic flight displays have been dramatically improved regarding how information is displayed and what information is available to a pilot. With only the push of a button, a pilot is able to access information that was traditionally contained in multiple publications. (Electronic databases have replaced paper manuals and reduced the clutter in the flight deck.) Multi-Function Displays (MFD) are capable of displaying moving maps that mirror sectional charts. These detailed displays depict all airspace including permanent temporary flight restrictions (TFRs).

In fact, MFDs have become so descriptive that many pilots fall into the trap of relying solely on the moving maps for navigation. In addition, pilots are drawing upon the database to familiarize themselves with departure and destination airport information.

Pilots are relying heavily on the electronic database for their flight planning and have moved away from the traditional method of cross-country flight planning. It is imperative to understand that the electronic flight display adds to the overall quality of the flight experience, but can also lead to catastrophe if not utilized properly. At no time is the moving map meant to substitute for a VFR sectional or Low Altitude En Route chart.


Traffic Avoidance

Electronic flight displays have the capability of displaying transponder-equipped aircraft on the MFD as well as the inset map on the PFD. However, due to the limitations of the systems, not all traffic is displayed. Some TIS units display only eight intruding targets within the service volume. The normal service volume has altitude limitations of 3,500 feet below the aircraft to 3,500 feet above the aircraft. The lateral limitation is 7 NM. [Figure 11-17] Pilots unfamiliar with the limitations of the system may rely on the aural warnings to alert them to approaching traffic.

Figure 11-17. The Area Surrounding the Aircraft for Coverage Using TIS.

Figure 11-17. The Area Surrounding the Aircraft for Coverage Using TIS.

In addition to an outside visual scan of traffic, a pilot should incorporate any Traffic Information electronically displayed such as TIS. This innovation in traffic alerting reinforces and adds synergy to the ability to see and avoid. However, it is an aid and not a replacement for the responsibilities of the pilot. Systems such as TIS provide a visual representation of nearby traffic and displays a symbol on the moving map display with relative information about altitude, vertical trends, and direction of flight. [Figure 11-18]

Figure 11-18. A Typical Display on Aircraft MFD When Using TIS.

Figure 11-18. A Typical Display on Aircraft MFD When Using TIS. [click image to enlarge]

It is important to remember that most systems display only a specific maximum number of targets allowed. Therefore, it does not mean that the targets displayed are the only aircraft in the vicinity. The system displays only the closest aircraft. In addition, the system does not display aircraft that are not equipped with transponders. The display may not show any aircraft; however, a Piper Cub with no transponder could be flying in the area. TIS coverage can be sporadic and is not available in some areas of the United States. Traffic advisory software is to be utilized only for increased situational awareness and not the sole means of traffic avoidance. There is no substitute for a good visual scan of the surrounding sky.

 

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