When could the Baltic operation launch?

When would the alternative Baltic operation actually take place?

Jellicoe's demand for preparation would probably delay it until about June 1915, still before Germany's major submarine buildup.

The operation replaces Gallipoli but would probably take longer to assemble than the historical Dardanelles attack. Jellicoe would want troops, ships, supplies, and specialized preparations in place before sailing. A June 1915 launch is more likely than February. Even with that delay, the attack comes before the German submarine force reached its later wartime scale. The opportunity narrows as mines, fortifications, and U-boat numbers grow.