ODP logging contractor: LDEO-BRG
Hole: 1257A
Leg: 207
Location: Demerara Rise (equatorial NW Atlantic)
Latitude: 9° 27.230' N
Longitude: 54° 20.518' W
Logging date: January 18-19, 2003
Bottom felt: 2962 mbrf
Total penetration:  284.7 mbsf
Total core recovered: 216.05 m (75.89%)

VSP TOOL USED: WST (Well Seismic Tool)

Acquisition Break Time: Time between start of recording and first break

Acquisition Transit Time: Time between shot firing (as recorded by blast phone) and first break. The shot is fired ~12 milliseconds after start of recording. The difference between Acquisition Break Time and Acquisition Transit Time is not constant and varies for each shot.

VSP STACKS SUMMARY LISTING (one-way transit times)

DEPTH ACQUISITION_ ACQUISITION_  ACQUISITION_     
(mbsf) SHOT_TIME   BREAK_TIME    TRANSIT_TIME       
                     (s)             (s)               

290.3	19-01-2003:08:35:31	2.138611	2.12692
254.0	19-01-2003:08:48:25	2.123805	2.112094
224.0	19-01-2003:09:06:01	2.107966	2.097161
194.0	19-01-2003:09:19:12	2.092169	2.080658
164.0	19-01-2003:09:34:55	2.075229	2.063515
134.0	19-01-2003:09:51:23	2.059533	2.047862
104.0	19-01-2003:10:10:02	2.042901	2.03125
94.0	19-01-2003:10:23:29	2.03648	2.02508