Pulse Block Days
Pulse Block Days

 
 
  
 
  
 
  
 
  
 
  

Noise Base Data Legend

ICES sub-rectangle

UK Licence Blocks

German Naval Polygon

Point

Very Low

Sonar or acoustic deterrents (source level, rounded to nearest decibel)
176-200 dB re 1 μPa m

Generic explicitly impulsive source (energy source level, rounded to nearest decibel)
186-210 dB re 1 μPa2 m2 s

Airgun arrays (zero to peak source level, rounded to nearest decibel)
209-233 dB re 1 μPa m

Explosions (equivalent TNT charge mass, rounded to nearest 10 g if less than 10 kg and to nearest 1 kg otherwise)
8 g to 210 g

Impact pile driver (hammer energy, rounded to nearest 10 kJ)
< 280 kJ
Low

Sonar or acoustic deterrents (source level, rounded to nearest decibel)
201-210 dB re 1 μPa m

Generic explicitly impulsive source (energy source level, rounded to nearest decibel)
211-220 dB re 1 μPa2 m2 s

Airgun arrays (zero to peak source level, rounded to nearest decibel)
234-243 dB re 1 μPa m

Explosions (equivalent TNT charge mass, rounded to nearest 10 g if less than 10 kg and to nearest 1 kg otherwise)
220 g - 2.1 kg

Impact pile driver (hammer energy, rounded to nearest 10 kJ)
290 kJ - 2.80 MJ
Medium

Sonar or acoustic deterrents (source level, rounded to nearest decibel)
211-220 dB re 1 μPa m

Generic explicitly impulsive source (energy source level, rounded to nearest decibel)
221-230 dB re 1 μPa2 m2 s

Airgun arrays (zero to peak source level, rounded to nearest decibel)
244-253 dB re 1 μPa m

Explosions (equivalent TNT charge mass, rounded to nearest 10 g if less than 10 kg and to nearest 1 kg otherwise)
2.11 kg - 21 kg

Impact pile driver (hammer energy, rounded to nearest 10 kJ)
2.81 - 28 MJ
High

Sonar or acoustic deterrents (source level, rounded to nearest decibel)
> 220 dB re 1 μPa m

Generic explicitly impulsive source (energy source level, rounded to nearest decibel)
> 230 dB re 1 μPa2 m2 s

Airgun arrays (zero to peak source level, rounded to nearest decibel)
> 253 dB re 1 μPa m

Explosions (equivalent TNT charge mass, rounded to nearest 10 g if less than 10 kg and to nearest 1 kg otherwise)
22 kg - 210 kg

Impact pile driver (hammer energy, rounded to nearest 10 kJ)
> 28 MJ
Very High

Explosions (equivalent TNT charge mass, rounded to nearest 10 g if less than 10 kg and to nearest 1 kg otherwise)
> 210 kg

     Noise Base Data
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Years

    
    
    
    
    
    
    
    
    
Noise value codes
Source Event
Mitigation systems
  

  Other Layers (year:)
Indicator
          
             
             
Maps of pulse block days by Value Code
Reporting units