Cetacean Welfare in Military Sonar Operations

Military sonar operations have been linked to mass strandings of cetaceans, causing acute injury, disorientation, and death in beaked whales and other species sensitive to intense sound.

Key Facts

Mid-frequency active sonar (MFAS) has been directly linked to mass strandings of Cuvier's beaked whales
Sonar causes gas emboli (decompression sickness) in beaked whales, resulting in internal haemorrhage
Over 40 mass stranding events involving beaked whales have occurred near military exercises since 1960
NATO countries have implemented some mitigation protocols including lookout observers and exercise area avoidance
The Mediterranean Sea is particularly affected due to high military exercise frequency and beaked whale populations
Some courts have ruled that military sonar use requires environmental impact assessment under national law

Welfare Considerations

Military sonar represents one of the most acute anthropogenic welfare threats to deep-diving cetaceans. The injuries caused by sonar-induced gas emboli are severe and often fatal. While military necessity is acknowledged, significant improvements in mitigation are achievable including better planning, real-time monitoring, and exclusion zones near sensitive habitats. International agreements comparable to those regulating shipping noise are urgently needed.

What You Can Do

Support organisations like the Natural Resources Defense Council working on sonar regulation
Advocate for international agreements limiting military sonar use near cetacean habitats
Support research into alternative sonar technologies with lower biological impact
Raise awareness about the link between military operations and cetacean welfare
Contact your elected representatives about national military sonar mitigation standards