ODP logging contractor: LDEO-BRG
Hole: 1251H
Leg: 204
Location: Hydrate Ridge - Cascadia Margin (NE Pacific)
Latitude: 44° 34.2089' N
Longitude: 125° 4.4514' W
Logging date: August 17-18, 2002
Bottom felt: 1220 mbrf
Total penetration:  445 mbsf
Total core recovered:  no cores taken in this hole.

VSP TOOL USED: WST3 (3-Component 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)               

186	18-08-2002:04:36:31	1.201588	1.150434
145	18-08-2002:05:31:53	1.200104	1.148972
138	18-08-2002:05:39:56	1.180928	1.129803
130	18-08-2002:05:55:43	1.179255	1.128119
123	18-08-2002:06:00:37	1.182535	1.131408
100	18-08-2002:06:21:29	1.167942	1.116786
93	18-08-2002:06:26:53	1.170134	1.118988