Region

The user can choose a region. A region corresponds to a predefined geographical area.

Currently several regions are defined on the website :

• St. Lawrence estuary and gulf
  
• Atlantic
• Great Lakes
• Pacific
• Arctic
• Salish Sea

Shipping noise (Anthropophony)

This noise represents all the noises generated by maritime transport. Any ship generates noise due to its movement and activity on the water. This noise depends of course mainly on the type of boat, its speed and its size.

Sea state noise (Geophony)

All the sounds coming from abiotic elements such as wind, water, rain, ground movements ... These are noises that are not due to humans (anthropophony) or due to living organisms (biophony).

Bathymetry

Bathymetric data representing the depth of the sea relief. They are defined in meters on the application from data interpolated from SHC data (+ MNEC). In the figure below, taken from a screenshot of a section in depth on the application, it is possible to see the evolution of the bathymetry plotted in gray.

Shipping

Maritime transport data comes from the compilation of AIS (Automatic Identification System) data from vessels over a period of time in a given region. The data unit is boat hour per day square kilometer (boat.h / (day.km²)) which corresponds to a traffic density.

Maritime transport maps make it easy to identify the maritime traffic and the most used waterways.

Shipping categories

Different categories exist for this dataset. These categories are :

• the mean
• the distribution of percentiles
• categorization by size, type or speed of vessel

Sound quantiles 

In statistics and probability theory, quantiles are the values that divide a data set into intervals containing the same number of data. For example, the 0.9 quantile represents the noise level where 90% of the values are lower.

Sound quantile categories

Different categories exist for this dataset. These categories are :

• Shipping noise
  
• Sea stage noise
  

Probability of exceeding sound levels

The probability of exceeding sound levels (abbreviated as sound risk) is the probability that the noise exceeds a certain threshold defined by the parameter L_p,f threshold (dB).

Sound risk categories

Different categories exist for this dataset. These categories are :

• Shipping noise
• Sea state noise
  

Risks of sound impact

A risk of sound impacts is the probability that navigation noise has a particular impact on marine mammals.

Risks of sound impact categories

Different categories exist for this dataset. These categories are :

• Masking of underwater ambient noise (anthropization of the acoustic landscape)
  • Risk that navigation noise masks ambient underwater noise (geophony)
    
• Reduction of detection / communication range
  
  • Risk of navigation noise reducing detection / communication range
    
• Behavioral disturbance
  
  • Risk of navigation noise causing behavioral disturbance
    
• Temporary hearing loss
  
  • Risk of navigation noise causing temporary hearing loss