  We show how derived completion can be used to prove an analogue of
Atiyah-Segal completion for the $T$-equivariant Hermitian K-theory of a scheme
$X$ with a trivial $T$-action, containing $\tfrac{1}{2}$ and satisfying the
resolution property, where $T$ is a split torus of rank $t$. This result is an
important first step towards a more general Atiyah-Segal completion theorem for
Hermitian K-theory.
