What is VNC in Aviation? (Vfr Navigation Chart)

In aviation, VFR stands for Visual Flight Rules, which is a set of regulations and procedures that govern the operation of aircraft in visual meteorological conditions (VMC). VFR navigation charts, also known as VNC charts, play a crucial role in assisting pilots with navigation during VFR flights.

A VFR navigation chart is a specialized map that provides visual representation of the terrain, airspace, and navigational aids in a specific geographical area. These charts are designed to aid pilots in planning and executing VFR flights by providing essential information, such as landmarks, en route navigation, and airspace boundaries.

The VNC charts are created and published by the national aviation authorities of each country, such as the Federal Aviation Administration (FAA) in the United States or Transport Canada. They are typically updated on a regular basis to ensure accuracy and reflect any changes in airspace, landmarks, or navigational aids. Pilots are required to have the most current edition of the VNC chart for their intended flight area.

The Importance of VFR Navigation Chart

VFR navigation charts serve as a vital tool for pilots conducting VFR flights. Here are some of the reasons why these charts are important:

The Visual Representation of Terrain and Landmarks

One of the main purposes of VNC charts is to provide pilots with a visual representation of the terrain and prominent landmarks in a given area. This allows pilots to navigate based on visual cues and familiarize themselves with the topography of the region they are flying in. By identifying significant landmarks such as rivers, highways, or mountains, pilots can easily orient themselves and stay on course.

For example, on a VNC chart, pilots can easily identify major rivers or roads that can serve as reference points during a flight. These visual cues help pilots maintain situational awareness and ensure accurate navigation, especially when flying over large expanses of water or unfamiliar terrain.

En Route Navigation Assistance

VNC charts also provide en route navigation assistance by depicting navigational aids such as VOR (Very High Frequency Omnidirectional Range) stations and airports. These aids help pilots establish their position, track their progress, and determine the location of nearby airports or emergency landing sites.

For instance, if a pilot needs to divert or land at an alternate airport due to weather conditions or an in-flight emergency, the VNC chart provides crucial information about nearby airports, including their frequencies, runway lengths, and services available. This information enables pilots to make informed decisions during their flight and ensures a safe and efficient diversion or landing.

Airspace Awareness and Boundaries

VFR navigation charts are also essential for maintaining airspace awareness and adhering to airspace boundaries. These charts display various types of airspace, including controlled airspace, restricted areas, and danger areas. Understanding the boundaries and characteristics of different airspace types is crucial for pilots to comply with regulations and communicate effectively with air traffic control.

By referring to the VNC chart, pilots can easily identify the different classifications of airspace in their flight path and plan their routes accordingly. They can also determine the appropriate altitudes to fly at and ensure compliance with altitude restrictions in specific airspace areas.

Additionally, VNC charts provide information about radio frequencies for air traffic control and communication services. This allows pilots to establish and maintain communication with the relevant authorities in their flight area, enhancing overall safety and situational awareness.

Using a VFR Navigation Chart

Now that we understand the importance of VNC charts in aviation, let’s explore how pilots can effectively use them during VFR flights.

Pre-Flight Planning

Before embarking on a VFR flight, pilots should thoroughly review the VNC chart for their intended flight area. This includes studying the terrain, landmarks, navigational aids, and airspace information. By familiarizing themselves with these details, pilots can develop a comprehensive flight plan and identify potential challenges or considerations for their route.

During pre-flight planning, pilots should also consult other available resources, such as weather briefings and NOTAMs (Notices to Airmen), to gather additional information that may impact their flight. This ensures that they are well-prepared and aware of any changes or restrictions that may affect their intended route.

In-Flight Navigation

Once in the air, pilots should have the VNC chart readily accessible in the cockpit for reference during the flight. This can be in physical paper format or electronic form, depending on the pilot’s preference and available technology.

During the flight, pilots should continually cross-reference their visual surroundings with the information on the VNC chart. This includes identifying landmarks, confirming their position using navigational aids, and monitoring their progress in relation to the planned route.

If necessary, pilots may need to make adjustments to their flight plan based on real-time conditions or unforeseen circumstances. The VNC chart provides the necessary information to identify suitable alternate airports or potential emergency landing sites in the vicinity, allowing pilots to make informed decisions and take appropriate actions.

Maintaining Currency

Given the dynamic nature of aviation and the continuous updates to airspace or navigational aids, it is essential for pilots to ensure the currency of their VNC charts. Pilots should regularly check for new chart editions or updates issued by the relevant aviation authority.

Many aviation authorities provide a subscription or update service to assist pilots in obtaining the latest versions of the VNC chart. This service helps pilots stay current and ensures that they have access to the most accurate and up-to-date information for their flights.

It is important to note that relying solely on outdated charts or information can pose significant safety risks and may lead to incorrect navigation or non-compliance with airspace regulations. Therefore, pilots must prioritize the currency of their VNC chart and update it regularly to ensure the highest level of flight safety.


VFR navigation charts, or VNC charts, are indispensable tools for pilots conducting VFR flights. These charts provide a visual representation of the terrain, landmarks, navigational aids, and airspace boundaries, enabling pilots to navigate accurately and comply with regulations.

By understanding the importance of VNC charts and utilizing them effectively during pre-flight planning and in-flight navigation, pilots can enhance their situational awareness and ensure safe and efficient VFR flights. It is vital to prioritize the currency of the VNC chart and regularly update it to stay current with any changes or updates.

Whether you’re a seasoned aviator or an aspiring pilot, the VNC chart is an essential tool that should always be part of your aviation toolkit.

For More: What is ZFT in Aviation? (Zero-Fuel Time)