The canal is closed to vessel traffic during the race.
The station also oversees vessel traffic in the 2,500-square-mile Prince William Sound.
These results are believed to show habituation of the dolphins to the vessels in a region of long-term vessel traffic.
The surge in vessel traffic and cargo prompted the port's increased environmental efforts.
Sources of noise can come from dredging, pile driving, increased vessel traffic, seawall construction, and soil improvement.
It is also nearer the coast than our previous activities so offers different constraints of beaches, wildlife and vessel traffic.
This will in turn attract a higher volume of vessel traffic including a greater number of coastal feeder vessels.
A similar form of deterrent is noise pollution originating from vessel traffic.
In addition, the Coast Guard was authorized, although not required, to adopt other types of regulations for vessel traffic and navigation.
The canal is currently handling more vessel traffic than had ever been envisioned by its builders.