HMS Dreadnought British dreadnought battleship
HMS Dreadnought, either entering or leaving a harbour circa 1906-7. Note the abundance of flags, with flags are being flown from both masts and the stern-staff. The Union Flag is being worn from the peak (but below another flag, perhaps the naval ensign or a royal standard) on the foremast instead of from the jack-post (from where it would be flown when moored). The naval ensign is being flown from the small second mast. The flag on the stern-staff is not completely clear, but appears to be another naval ensign. There is also a pennant flying part way down the mast.
The dark cone-shaped objects suspended from the main mast are probably red and green markers to identify port and starboard respectively.
Note also the patchwork nature of paintwork on the ship's hull and forecastle. Perhaps Dreadnought's schedule has forestalled a more thorough repainting
Source: US Naval Historical Center photograph, NH 63367.