France and the United Kingdom agreed to support Poland and in August of 1939, German troops began to gather on the Polish border. By September 1st, Germany launched an invasion of Poland. 16.
Plum Island sits in Long Island Sound, one end pointing toward the Connecticut coast and the other toward Long Island's North Fork. By ferry, it is over an hour from either shore. An old lighthouse seems to invite tourists but no outsiders are allowed on the secured facility.
The closest mainland access point is the township of Plum Tree via Stanage Bay which his located 12 nautical miles south of the island. Yeppoon and Mackay are approximately 100 nautical miles to the south and north respectively.