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doi:10.2204/iodp.sp.311.2005

Table T1. Expedition 311 operations summary.
Site
Location
(lat, long)
Seafloor depth (mbsl)
Operations description
Transit (days)
Drilling/Coring (days)
Wireline logging (days)
Balboa, Panama
Start of Expedition 311
4.0 days
(In Port)

Transit ~3800 nmi to Astoria, Oregon, at 10.5 kt
15.1
Astoria, Oregon
Science Party boards ship
1.0 day
(In Port)

Transit ~206 nmi to Site CAS-03B at 10.5 kt
0.8
CAS-03B
 		48°37.058'N,
 127°02.413'W
 		1780
 		Hole A: LWD/MWD to 300 mbsf
BSR at ~230 mbsf
1.2

DP move ~2.8 nmi to Site CAS-02C at 1.0 kt
0.0
CAS-02C
 		48°38.688'N,
 126°58.993'W
 		2230
 		Hole A: LWD/MWD to 300 mbsf
BSR at ~230 mbsf
1.0

DP move ~5.7 nmi to Site CAS-01B at 1.0 kt
0.2
CAS-01B
 		48°41.884'N,
 126°51.924'W
 		1325
 		Hole A: LWD/MWD to 380 mbsf
BSR at ~215 mbsf
1.3

DP move ~0.8 nmi to Site CAS-06A at 1.0 kt
0.0
CAS-06A
 		48°40.050'N,
 126°51.053'W
 		1280
 		Hole A: LWD/MWD to 300 mbsf
BSR at ~215 mbsf
0.9

DP move ~9.9 nmi to Site CAS-05D at 1.0 kt
0.4
CAS-05D
 		48°47.367'N,
 126°40.717'W
 		970
 		Hole A: LWD/MWD to 220 mbsf
0.8
Hole B: APC to ~200 mbsf, XCB to TD at 220 mbsf (APCT/DVTPP temperature and PCS/HYACINTH pressure coring)
2.2
- Wireline log with triple combo/FMS-sonic (~10 h)
BSR @ ~130 mbsf
0.4

DP move ~9.9 nmi to Site CAS-06A at 1.0 kt
0.4
CAS-06A
 		48°40.050'N,
 126°51.053'W
 		1280
 		Hole B: APC to ~200 mbsf, XCB to TD at 300 mbsf (APCT/DVTP temperature and PCS/HYACINTH pressure coring)
2.5
(Active Cold Vent)

- Wireline log with triple combo/FMS-sonic (~12 h)
0.5

DP move ~0.8 nmi to Site CAS-01B at 1.0 kt
0.1
CAS-01B (Site 889)
 		48°41.884'N,
 126°51.924'W
 		1325
 		Hole B: APC to ~200 mbsf, XCB to TD at 350 mbsf (APCT/DVTP temperature and PCS/HYACINTH pressure coring)
2.8
- Wireline log with triple combo/FMS-sonic (~13 h)
0.5
- Checkshot VSP with WST-3 (~6 h)
0.3

DP move ~5.7 nmi to Site CAS-02C at 1.0 kt
0.3
CAS-02C
 		48°38.688'N,
 126°58.993'W
 		2230
 		Hole B: APC to ~200 mbsf, XCB to TD at 300 mbsf (APCT/DVTP temperature and PCS/HYACINTH pressure coring)
3.0
(First Slope Basin)

- Wireline log with triple combo/FMS-sonic (~13 h)
0.6

DP move ~2.8 nmi to Site CAS-03B at 1.0 kt
0.1
CAS-03B
 		48°37.058'N,
 127°02.413'W
 		1780
 		Hole B: APC to ~200 mbsf, XCB to TD at 300 mbsf (APCT/DVTP temperature and PCS/HYACINTH pressure coring)
2.9
- Wireline log with triple combo/FMS-sonic (~13 h)
0.6

Transit ~134.0 nmi to Victoria at 10.5 kt
0.6
Victoria, B.C., Canada
End of Expedition 311
18.0
18.6
2.9

Subtotal transit time:
Subtotal on-site time:
Total operating days:
Total expedition including 5.0 days of port call(s):
18.0
21.5
39.5
44.5

Notes: LWD/MWD = logging-while-drilling/measurement-while-drilling operations. BSR = bottom-simulating reflector. APC = advanced piston corer, XCB = extended core barrel. APCT = APC Temperature tool, DVTPP = Davis-Villinger Temperature-Pressure Probe, PCS = Pressure Core Sampler. TD = total depth. Triple combo = triple combination tool string, FMS = Formation MicroScanner. VSP = vertical seismic profile; WST-3 = three-component Water Sampling Temperature tool. Assumes 24 h required for boarding of scientists in Astoria, thus limiting Balboa port call to 4.0 days maximum. Assumes drill string round trip with LWD and MWD tools (memory download and battery change) after Sites CAS-02C and CAS-06A. Approval to drill Site CAS-06A is pending. If denied, then Site CAS-06B will be drilled.

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