Flag of Hawaii in command of the H.M.S. Discovery. During the Visit Vancouver met with Kamehameha I and presented him with a Red Ensign. At this time Ireland was not part of a united kingdom which meant the union jack did not contain Saint Patrick's Cross. This version of the Red Ensign, as well as the current version which added the cross in 1801, was the unofficial flag of the Kingdom of Hawaii until 1816. An adviser to Kamehameha noted that the Union Flag could draw Hawaii into international conflict, as his kingdom could be seen as an ally of the United Kingdom,
Union Jack use to the royal ships. After the Acts of Union 1707, the flag gained a regularised status as "the ensign armorial of the Kingdom of Great Britain", the newly created state. It was then adopted by land forces as well, although the blue field used on land-based versions more closely resembled that of the blue of the flag of Scotland. Various shades of blue have been used in the saltire over the years. The ground of the current Union Flag is a deep "navy" blue (Pantone 280), which can be traced to the colour used for the Blue Ensign of