The mast
mast-a vertical spar to support sails on a ship
A mast
A Tall Ship. A Caravel. A Bark. A Brigantine. A Clipper Ship. A Brig.
tall upright post, spar, or other structure on a ship or boat, in sailing vessels generally carrying a sail or sails.
There are several poles that hold sails. The one you are probably refering to is the mast, which is vertical and usually at least the length of the ship. Some designs can have more than one mast, in which case there are several different names for various arrangements, and the masts have different names as well. Another type of pole that holds a sail is the boom, which is a spar that connects the bottom edge of the mainsail to the mast so it can be controlled. Other types include spinnaker poles and whisker poles, which allow the use of different headsails to make the boat faster or more efficient.
Sails are attached to the mast.
A lamp pole is a tall post that supports outdoor lighting fixtures. It is typically made of metal or concrete and is used to illuminate streets, pathways, or outdoor spaces. Lamp poles play a key role in providing visibility and safety in outdoor areas during nighttime.
You are describing the mast.
Those tall poles on sailing ships that are responsible for holding the sails aloft.
5 ft (pole 15 ft)
it is not nessesery to be tall but it does help