subbottom depth recorder

subbottom depth recorder

[¦səb′bäd·əm ′depth ri‚kȯrd·ər]
(engineering)
A compact seismic instrument which can provide continuous soundings of strata beneath the ocean bottom utilizing the low-frequency output of an intense electrical spark discharge source in water.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.