Where is the rest all flags of the world?

[_RAAF_Smouch]

As an ex Navy man, I have to agree with Galway. The pictures you have posted are incorrect with the exception of the English battleship.

The only times that flags are flown on either the foremast or the stern mast were when the ships were at anchor or alongside in harbour. The ensigns are actually flown from the main mast whilst underway.

Also while underway at sea the masts on the bow and stern were actually taken down and stowed away.

That is for the R.N and R.A.N at least.