It is called mast.
It is called the mast
The pole you are referring to is called the mast. If the boat only has one mast it is usually not in the middle of the boat but is normally found in the forward third of the boat.
Do you mean the mast?
Is called a mast
Masts, or see: http://wiki.answers.com/Q/What_are_ship_poles_calledfor a more indepth answer.
a pole on a sailboat is a mast
Mast
Mast (vertical, leading edge of sail), Boom (horizontal,bottom of sail), and a spinnaker pole if you use a spinnaker which is a sail type
The pole on a sailboat is called the mast.
The mast
on most boats today there is one verticle "pole", the mast. one horizontal "pole" the boom. on older boats like scows and optimists the diagonal pole is called the sprit. there can also be a spinnaker pole which you clip onto the mast to hold out the spinnaker on a run or a reech. on a asymmetric boat the spinnie pole is pulled out when the spinnie is raised, you cann't and shouldn't clip it onto the mast.
A pole on a boat that holds spars or sails.