Virtual AIS AtoN Symbols Quiz

Used to mark areas where ships should avoid sailing, often due to dangers like rocks or shallow water.

Used to mark areas where ships should avoid sailing, often due to dangers like rocks or shallow water.

A type of cardinal mark used to indicate a danger area that is located to the north.

A type of cardinal mark used to indicate a danger area that is located to the east.

Electronic Navigational Charts (ENC). An electronic type of chart used on ships.

Digital aids to navigation broadcast using AIS Message 21. These can be displayed on ECDIS, radar, or integrated navigation systems.

An AIS AtoN that represents an aid to navigation that physically exists in the real world.

An AIS AtoN that represents an aid to navigation that doesn't physically exist. It's created digitally.

Virtual AIS AtoNs are displayed on Electronic Navigational Charts (ENCs). They often indicate hazards, temporary changes, or virtual shipping lanes.

Physical AIS AtoNs are usually not encoded in ENCs. However, if they are, you can find information about them through the pick report when querying the aid to navigation.

Virtual AIS AtoNs are represented by specific symbols on ENCs, often in the shape of a diamond.

Virtual AIS AtoNs can be used to represent various things, such as wrecks, debris, uncharted hazards, and temporary shipping lanes.

Virtual AIS AtoNs on ENCs are typically permanent or exist for a specific fixed period.

A type of navigational marker used to mark a specific location, often used for safety or guidance purposes. They may provide information about a specific area, such as a harbor entrance or a restricted zone.

A type of navigational marker used to designate a safe area for navigation. Safe water markers indicate an area where vessels can safely travel without encountering any hazards.

A type of navigational marker used to mark areas that require special attention when navigating. This might include areas where visibility is limited, strong currents exist, or there might be underwater hazards.

A symbol on an Electronic Navigational Chart (ENC) indicating a general danger area, like a wreck or obstruction. The depth is unknown or less than the user's chosen safety contour.

An ENC symbol that indicates a soundings accuracy is low. It signifies a depth that is uncertain or unreliable.

A symbol on an ENC indicating that a specific caution note applies to the area. More information can be accessed using the cursor enquiry button.

A symbol indicating a new feature on an ENC that has been recently discovered, but not yet fully understood.

This code indicates that the survey information for the area is of the highest quality, and all significant seafloor features have been detected.

This rating means that the survey is of high accuracy, and all significant seafloor features have been located.

Indicates that the survey is of medium accuracy, but there may be some uncharted features that could pose a risk to navigation.

Indicates a survey with a lower accuracy, where depth anomalies may be expected. This could mean that there are errors in the depth readings.

This survey rating indicates that the data quality is poor, and large depth anomalies can be expected. This means that many depth readings could be incorrect.

This symbol on an ENC signals that the quality of the bathymetry data is not yet known or assessed.

A buoy specifically designed for safe water used for navigation purposes. It might have a shape or a distinctive topmark that indicates its function.

Indicates that a mandatory attribute, such as a beacon's shape, direction, or orientation, is not present.

Official digital charts used for electronic navigation. They often display an area's geographical and navigational information.

A dashed line on an ECDIS chart that separates areas of officially regulated electronic data (ENC) from unofficial data. The pecks point towards the unofficial data area.

An essential use for navigation, often employed when official ENC data is not available. It is crucial for mariners to consult alternative charts within areas where ENC data is absent.

A buoy that marks a lateral danger area, with its color determined by the applicable IALA system - red for port or green for starboard.

A buoy marking a cardinal direction, indicating a danger area located in that direction. Colors and shapes vary depending on the direction.

A buoy marking an isolated danger, with a yellow color and two black spheres.

A buoy that marks an area deeper than the safety contour, providing information to navigate deeper water.

Vertical lines on a nautical chart, indicating the presence of data at a significantly smaller scale than the main display. These lines disappear when zoomed out.

A query on a nautical chart indicating insufficient information to symbolise a feature. The query can appear alone, on a line, or within a defined area.

The boundary between IALA A and B buoyage systems, where different systems of marking navigation hazards are used.

The traditional IALA system (Region B), where red buoys are on the starboard side and green on the port side.