  A comprehensive theoretical study of the E1, M1, E2 transitions of Ca-like
tungsten ions is presented. Using multi-configuration Dirac-Fock (MCDF) method
with a restricted active space treatment, the wavelengths and probabilities of
the M1 and E2 transitions between the multiplets of the ground state
configuration ([Ne]3s$^{2}$3p$^{6}$3d$^{2}$) and of the E1 transitions between
[Ne]3s$^{2}$3p$^{5}$3d$^{3}$ and [Ne]3s$^{2}$3p$^{6}$3d$^{2}$ have been
calculated. The results are in reasonable agreement with available experimental
data. The present E1 and M1 calculations are compared with previous theoretical
values. For E2 transitions, the importance of electron correlation from 3s and
3p orbitals is pointed out. Several strong E1 transitions are predicted, which
have potential advantage for plasma diagnostics.
