plane sailing
noun Navigation.
sailing on a course plotted without reference to the curvature of the earth.
Compare
plain sailing,
spherical sailing.
Origin of plane sailing
First recorded in 1690–1700
Words nearby plane sailing
Example sentences from the Web for plane sailing
Plane-sailing is so simple that it is colloquially used to express anything so easy that it is impossible to make a mistake.
The Sailor's Word-Book |William Henry Smyth
British Dictionary definitions for plane sailing
plane sailing