Category
page 1Maritime flags
Jolly Roger
pirate flag
international maritime signal flag
flag used to communicate something about the ship flying it from a distance
flag of convenience
the business practice registering a ship under a different sovereign state than that of its owners, to reduce costs or avoid regulations
naval jack
maritime flag used by warships in addition to the ensign
maritime flag
flag designated for use on ships or at sea

Burgee
thumb|Burgee of the New York Yacht Club
A burgee ( from French , "owner (of a ship)") is a distinguishing flag, regardless of its shape, of a recreational boating organization. In most cases, they have the shape of a pennant.
Dressing overall
decorating a ship with (signal) flags
Declaration recognising the Right to a Flag of States having no Sea-coast
1921 treaty which recognised that a land-locked state could register ships and sail them on the sea using its own flag