"Any secret that's out in the open isn't a secret at all. Stockpiling ordinary strategic materials and slapping a 'Support for Russia' label on them might pass, but something as large as a battleship can never be kept under wraps.
Finding some secluded port for secret production is a joke. Times have changed. Modern battleships tip the scales at tens of thousands of tons and require a massive amount of manpower and resources to construct.
Unless Shinra decides to isolate itself from the world, once the normal flow of goods reaches a certain scale, secrecy is impossible.
To think you can hide such things is child's play. In reality, it simply can't be done.
The age of free trade has accelerated the circulation of goods and capital, while also creating opportunities for spies to infiltrate.
Ever since the Russian-Austrian naval agreement was signed, Shinra's major shipyards have become a focal point of interest for espionage.