Dose?
The Union Jack is let to fly on the ships also on sea but the Union Flag is let to fly on Land. That is the difference between the two two flags. Hope this Helps. :) The Union Jack was never called the union flag, The Union Jack was the flag of England
the same as now: The Union Jack
Ships of the United Kingdom will fly under the Union 'Jack' (Union Flag) along with a 'Red Duster' (Red Ensign). Also, ships of other British Sovereign Territories (ex-empire) eg. Bermuda, Bahamas will also use the Union 'Jack' as well as their own flag.
Union Flag, or more casually the Union Jack
The same flag that it flies at other times - the Union Flag - sometimes incorrectly called the Union Jack.
The small flagpole at the prow (front) of a ship is called the jack. Flags flown from this are called jack flags and are be necessity quite small. Royal Navy battleships traditionally fly the Union Flag from the jack (and the Royal Ensign from the stern), which is where the incorrect name (Union Jack) comes from.
The Union Jack is the nickname of the UK flag.
The British Union. It is commonly referred to as the "Union Jack" but technically that name applies only when a flag of that design is flown from the jack staff at the bow of a ship. When flown on land it is called the Union Flag. When flown at sea you can be in trouble because only the Royal Navy may fly the Union Flag or Union Jack at sea. Private citizens are not allowed to do so; their yachts must fly the Red Ensign.
I'm not sure what you mean by 'special name', but the official name for the British flag is: Union Jack
The jack refers to the jackstay of a ship, on which the Union Jack would be displayed. Strictly speaking the flag should be called the Union Flag, but Union Jack is well known. Actually, the union jack is what the flag is called out at sea, but the union flag is what they call it on land.
The term "Union Jack" is not considered correct because a Jack is a flag flown from a ship and British merchant ships fly the Red ensign and the Royal Navy flies the White Ensign. The Official title of the Flag of the United Kingdom is the "Union Flag" and unoffically "British Flag" although this term might be considered controversial in Northern Ireland
it is the union flag on land and the union jack at sea