Steady-as-she-goes

Origin

From the nautical phrase steady as she goes.

Full definition of steady-as-she-goes

Adjective

1. (idiomatic) steady; careful; avoiding sudden change
• 20 September 2012, Andrew Brown, Archbishop of Canterbury succession race begins in earnestGraham James, the bishop of Norwich, is favourite everywhere of the steady-as-she-goes party. He is widely experienced – he worked in Lambeth Palace under the previous archbishop, Lord Carey – and widely trusted, as well as scholarly.
• 2000, Matthew V. Schofield, When Reason FailsHe looked to be in fine shape, sitting glassy-eyed behind the wheel, staring straight at the narrow two-lane highway, holding a steady-as-she-goes course of fifty miles an hour.