Situational Awareness

Situational Awareness (SA) is the perception of elements in the environment within a volume of time and space, the comprehension of their meaning, and the projection of their status in the near future. In simpler terms, SA means knowing what is happening around you, understanding what it means, and anticipating what will happen next. Good SA means: - You know where you are, where you are going, and what is happening - You understand the implications of current events - You can anticipate future developments Poor SA means: - You are surprised by events - You have missed important information - You have an incomplete or incorrect mental picture

Level 1 — Perception: Gathering information from the environment. This involves seeing, hearing, and sensing what is happening around you. Examples include reading instruments, hearing radio calls, feeling aircraft movements, and noticing weather changes. Level 2 — Comprehension: Understanding what the perceived information means. This involves integrating multiple pieces of information to form a coherent picture. Examples include recognising that a trend in instrument readings indicates a developing problem. Level 3 — Projection: Anticipating what will happen in the near future. This is the highest level of SA and involves predicting future states based on current understanding. Examples include anticipating that your current heading and speed will result in a late arrival. Most SA failures occur at Level 1 — the information is available but not perceived. Training and procedures help address this by directing attention to critical information.

The 1972 crash of Eastern Air Lines Flight 401 is a classic case study in loss of situational awareness. Flight 401 was approaching Miami International Airport when the crew noticed the nose landing gear indicator light had not illuminated. They became fixated on troubleshooting the landing gear problem and failed to notice that the autopilot had disengaged. As they focused on the light, the aircraft gradually lost altitude. By the time they realised their situation, it was too late. The aircraft crashed into the Everglades, killing 101 people. Key lessons: - Fixation on a single problem can cause loss of SA - Automation changes require active monitoring - Crew coordination and task sharing are essential - Even experienced crews can lose SA

Maintaining good SA is an active process that requires ongoing effort: Individual strategies: - Scan instruments systematically and regularly - Verbalise observations and intentions - Challenge assumptions and confirm understanding - Take time to build and update your mental picture Team strategies: - Share information proactively — do not wait to be asked - State intentions clearly before acting - Encourage team members to speak up if they notice something - Cross-monitor each other's performance Shared SA occurs when the entire team has the same mental picture of the situation. This is critical for safe operations and requires open communication and mutual respect.