masting and rigging 
Masting: masts, yards, ropes and other movable sailing equipment that support and manipulate the rigging.
Mast that is immediately above a lower mast and carries a topsail.
Mast above the fore-topmast that carries a topgallant sail.
Mast above the fore-topgallant mast that carries a royal sail.
Bottom section of a mast that is solid and thick so it can support the upper sections.
Platform at the top of the lower mast from which the upper rigging can be manipulated.