VFR between layers

VFR between layers

[‚vē‚ef′är bi‚twēn ′lā·ərz]
(aerospace engineering)
A flight condition wherein an aircraft is operated under modified visual flight rules while in flight between two layers of clouds or obscuring phenomena, each of which constitutes a ceiling.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.