The findings are significant because I Gusti Ngurah Rai International Airport serves as one of Indonesia’s busiest international aviation gateways and supports the country’s tourism economy. Improving aircraft landing performance during low-visibility conditions could reduce operational risk while strengthening airport reliability.
Why Bali’s Airport Faces Unique Landing Challenges
Aircraft landing is one of the most critical phases of flight. At I Gusti Ngurah Rai International Airport, that challenge becomes more complex because Runway 27 faces directly toward coastal waters.
According to the study, this geographical condition increases the likelihood of what aviation experts describe as a “black-hole approach” a situation in which pilots receive limited visual references due to surrounding darkness or open water environments. In poor weather, high humidity, rain, or nighttime conditions, visual orientation becomes more difficult.
Existing approach lighting infrastructure at the airport remains aligned with lower-category visual guidance capability and may not fully support optimal operations under reduced visibility conditions.
As international traffic continues to grow, airports increasingly require more advanced visual systems that maintain safe and efficient landings.
How the Research Was Conducted
Rather than relying solely on simulation models, the study used a practical and field-oriented approach.
The research combined:
- Direct observation of the Runway 27 approach environment
- Review of airport technical documents and runway layouts
- Analysis of international aviation standards under ICAO Annex 14
- Technical interviews with airport operational and maintenance personnel
- Evaluation of obstacle conditions and environmental characteristics surrounding the airport
The study also incorporated environmental and cultural considerations through the Balinese philosophy of Tri Hita Karana.
This combination allowed the researcher to assess technical requirements while considering how airport infrastructure interacts with local environmental and social contexts.
The Proposed Lighting System: Longer, Brighter, and More Precise
The proposed solution is a Category II Precision Approach Lighting System (PALS CAT II) using an ALSF-II configuration extending 900 meters from the runway threshold.
The system includes several integrated visual guidance elements:
- Centerline lights to guide aircraft directly toward the runway
- Crossbars to improve pilot perception of position and alignment
- Side row barrettes to define safe lateral boundaries
- Sequenced flashing lights that provide directional visual cues during final approach
The configuration follows internationally recognized standards established in ICAO Annex 14.
The study also recommends replacing conventional lighting technology with high-intensity LED systems, which provide:
- Greater visibility in adverse weather
- Lower energy consumption
- Reduced maintenance requirements
- Longer operational lifespan
Sequenced flashing lights were designed to operate at approximately two flashes per second to improve runway recognition from greater distances.
Safety Gains Extend Beyond Visibility
The analysis suggests that the proposed PALS CAT II configuration can improve pilots’ ability to maintain approach stability and runway alignment during final descent.
Several operational advantages were identified:
- Improved visual acquisition of the runway threshold
- Lower risk of pilot disorientation during low visibility
- Reduced probability of unstable approaches
- Fewer go-arounds caused by loss of visual reference
- Better synchronization between instrument guidance and visual navigation
The research also recommends integrating the lighting system with the airport’s Instrument Landing System (ILS) and Precision Approach Path Indicator (PAPI) to create multiple layers of navigation support.
For an airport with intensive international operations, these improvements could translate into safer and more predictable flight schedules.
Bringing Balinese Philosophy Into Aviation Infrastructure
One of the most distinctive aspects of the study is the integration of Tri Hita Karana, a Balinese philosophy emphasizing harmony among people, nature, and spiritual values.
The concept was translated into airport infrastructure planning through three dimensions:
- Human safety by reducing aviation risk and protecting passengers and crews
- Social benefit through improved operational reliability for airport personnel and users
- Environmental balance through energy-efficient lighting and careful management of the coastal airport environment
As interpreted by I Wayan Dikse Pancane of Universitas Pendidikan Nasional, aviation infrastructure development does not need to separate technological advancement from local cultural identity. Instead, safety systems can be designed to support both international operational standards and environmental sustainability.
The study positions this integration as an example of how modern airport development may become more locally responsive without sacrificing global aviation requirements.
What This Could Mean for Future Airports
The implications extend beyond Bali.
The research suggests opportunities for future airport modernization through:
- Smart airport monitoring systems
- Internet of Things (IoT)-based lighting management
- Artificial intelligence for adaptive lighting control
- Renewable energy integration for airport infrastructure
If adopted more broadly, these approaches could contribute to safer and more sustainable airport operations across Indonesia and other coastal aviation environments.
Author Profile
I Wayan Dikse Pancane is a researcher and academic affiliated with Universitas Pendidikan Nasional (Undiknas), Indonesia. His work focuses on aviation safety systems, airport lighting infrastructure, sustainable airport development, and the integration of environmental and cultural approaches into air transportation operations.
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