  The production of W+W- pairs is analysed in a data sample collected by ALEPH
at a mean centre-of-mass energy of 182.7 GeV, corresponding to an integrated
luminosity of 57 pb-1. Cross sections are given for different topologies of W
decays into leptons or hadrons. Under Standard Model assumptions for the W-pair
production and decay, the W-pair cross section is measured to be
15.57+-0.62(stat.)+-0.29(syst.) pb. Using also the W-pair data samples
collected by ALEPH at lower centre-of-mass energies, the decay branching ratio
of the W boson into hadrons is measured to be B(W->hadrons)=
68.93+-1.21(stat.)+-0.51(syst.)%, allowing a determination of the CKM matrix
element |Vcs|= 1.043 +- 0.058(stat.) +- 0.026(syst.). The agreement of the
cross sections with the Standard Model prediction allows a limit to be set on
the W decay rate to undetectable final states.
