Ion Geophysical (IOGPQ) EFFECT Notice of effectiveness

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	April 9, 2014 4:00 P.M.

Form:

S-4

CIK:	0000866609
Company Name:	ION GEOPHYSICAL CORP
File Number:	333-194110

CIK:	0001600867
Company Name:	GX Technology Corp
File Number:	333-194110-03

CIK:	0001600906
Company Name:	ION EXPLORATION PRODUCTS (U.S.A.), INC.
File Number:	333-194110-02

CIK:	0001600904
Company Name:	I/O MARINE SYSTEMS, INC.
File Number:	333-194110-01