De or het stortmast?

The correct Dutch article is:

de stortmast

How to use stortmast

the stortmastde stortmast
this stortmastdeze stortmast
that stortmastdie stortmast
our stortmastonze stortmast
your stortmastjouw stortmast
every stortmastelke stortmast
which stortmast?welke stortmast?
a big stortmast / the big stortmasteen grote stortmast, de grote stortmast