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	18-08-2002:04:50:48	0.988489	0.922907
145	18-08-2002:05:28:38	0.957237	0.891456
130	18-08-2002:05:52:48	0.959042	0.89321
93	18-08-2002:06:30:58	0.934932	0.869176