sailing on a course plotted without reference to the curvature of the earth.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use plane sailing in a sentence
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
It was in great use among the French navigators, from its solving the problems of plane sailing.The Sailor's Word-Book | William Henry Smyth
All is not plane sailing yet for the German in search of foreign markets.
British Dictionary definitions for plane sailing
nautical navigation without reference to the earth's curvature: Compare plain sailing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012