fixed and group flashing light

fixed and group flashing light

[¦fikst ən ′grüp ¦flash·iŋ ′līt]
(navigation)
A fixed light varied at regular intervals by a group of two or more flashes of greater brilliance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.