Flag of Bosnia and Herzegovina bottom), similar to that of former Yugoslavia. The first Westendorp alternative flag was a highly similar one to today's flag, a diagonally divided top-hoist to bottom-fly yellow over light blue flag with line of 9 white five-pointed stars in the light blue field along the diagonal. The only major difference was that the colour of the background was UN blue. The second Carlos Westendorp alternative flag is a light blue flag (United Nations flag colours) with 5 bars interchangeably coming out of hoist and not reaching the other end. The colours are interchangeably yellow and white. In the third alternative
Flag strictly enforced. A national flag flown at sea is known as an ensign. A courteous, peaceable merchant ship or yacht customarily flies its ensign (in the usual ensign position), together with the flag of whatever nation it is currently visiting at the mast (known as a courtesy flag). To fly one's ensign alone in foreign waters, a foreign port or in the face of a foreign warship traditionally indicates a willingness to fight, with cannon, for the right to do so. As of 2009, this custom is still taken seriously by many naval and port authorities and is readily enforced