The Saint Lawrence Seaway
Erie canal
The Russian Federation has multiple port cities. Vladivostok is their major hub for the Asia-Pacific. Kalinigrad and St. Petersburg allow for ultimate access to the North Atlantic. Murmansk allows for Atlantic and Arctic Sea access additionally. The Mediterranean and Black Sea have port access through Crimea (acceded by Russia in 2014) and Sochi.
It means a route that allows water to flow.
river
river
river
river
The Welland Canal.
The major transportation system that allows ships to enter into the Atlantic Ocean is the St. Lawrence Seaway. It is located in Canada.
An object which is a conductor allows electricity to pass through it
The Panama Canal allows ships to pass through south America to Central America or vice versa.
Panama Canal
radiolucent allows x-ray pass through radiopaque does not allow it to pass through