  Spectra of the W$^{25+}$ ion are studied using the collisional-radiative
model (CRM) with an ensuing cascade emission. It is determined that the cascade
emission boosts intensities only of a few lines in the $10 - 3$ nm range. The
cascade emission is responsible for the disappearance of structure of lines at
about 6 nm in the electron beam ion trap plasma. Emission band at 4.5 to 5.3 nm
is also affected by the cascade emission. The strongest lines in the CRM
spectrum correspond to $4d^{9} 4f^{4} \rightarrow 4f^{3}$ transitions, while
$4f^{2} 5d \rightarrow 4f^{3}$ transitions arise after the cascade emission is
taken into account.
