Question

Ships have ballast tanks that fill with water from surrounding lakes or seas as needed to stabilize the craft. Why might the U.S. Coast Guard require ships to empty their ballast tanks before entering the Great Lakes?

(1 point)
Responses

to accurately obtain a vessel’s empty weight in order to determine the tonnage of fish caught
to accurately obtain a vessel’s empty weight in order to determine the tonnage of fish caught

to avoid unintentionally importing non-native species that would damage natural fisheries
to avoid unintentionally importing non-native species that would damage natural fisheries

to maintain the natural temperature, volume, and salinity of the Great Lakes
to maintain the natural temperature, volume, and salinity of the Great Lakes

to discourage aquiculture smugglers from carrying farmed fish in their ballast tanks
to discourage aquiculture smugglers from carrying farmed fish in their ballast tanks

to decrease a vessel’s weight to account for differences in buoyancy caused by changes in salinity

Answer 1

to avoid unintentionally importing non-native species that would damage natural fisheries