I don’t understand the question
"The town of Baltiisk, just outside Kaliningrad, is the only Russian Baltic Sea port said to be "ice-free" all year round, and the region hence plays an important role in maintenance of the Baltic Fleet."
One main advantage is that it is Russia's only Baltic port that remains free of ice year-round. The main disadvantage is that the location of this port is 200 miles away from the main land which makes it more difficult for other countries to deliever goods.
The port at St. Petersburg is Russia's only year round port. St. Petersburg is the 2nd largest city in Russia with a population of 4.88 million.
No it freezes in Winter in places
St. Petersburg
Traditionally, the Straits of Magellan in far south America was considered the only natural connection, but falling sea ice levels may establish a navigable year-round connection via the Arctic Ocean soon, and the Antarctic Ocean has long provided a connection that is navigable at least seasonally navigable. By far the most commercially important connection, however, is the artificial Panama Canal.
In 1945 the northern part of East Prussia was transferred from Germany to the Soviet Union and the southern part to Poland. The German population was expelled from both parts by 1947.
an examples of a Russian enclave would the Kaliningrad enclave that is located far enough south in the Baltic that it remains free of ice year round(;
Currently, the Russian Federation has the all season open port on the Crimean Peninsula. Previous to the annexation of the Crimea, Russia had a lease with Ukraine for the port of Sevastopol. That lease is now null & void.
Baltic Trading Limited (BALT)had its IPO in 2010.
River Thames