Naval/Postcard Questions

Naval Questions:
- When was the WWI dazzle camouflage removed from U.S. warships?
- Between 1900-1918 what types of fire control were used on different warships?
- When did the Japanese cruiser "Aso" visit the United States?
From the view I'm trying to date, I have narrowed it down to between 1908 and 1913
- Was the French Sloop "Kersaint" ever in Vladivostock?
- The Aircraft Carrier "Saratoga" went through the Panama Canal when before 1939?
- When did the "Tennessee" (launched 1906) arrive at Honolulu?
- Looking for history for many small obscure ships in my collection.

Can someone identify what is happening and the size of the gun? I have no idea.
Postcard Questions:
- I have information concerning when divided backs were allowed in the U.S.A., I was wondering if anyone had specific information on when it was allowed in other countries?