Kathy Metcalf of the Chamber of Shipping of America said her group has no doubt noise is increasing and affecting the whales. But measures such as slowing down ships or retrofitting them with new, more efficient propellers are costly and may not even work, she said.
A better remedy would be devising and incorporating quieter designs in the hulls and propellers of new vessels.
“We’re kind of a slow industry,” Metcalf said. “But the bottom line is if we could do something now that can be used as guidelines for new construction, 15 years from now, half the world’s fleet would have already been built that way.”
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