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Table T1. Time estimates for Superfast Spreading Rate Crust 2 and 3 (Expeditions 309 and 312).
Water depth (mbrf)
Operations description (mbsf)
Transit (days)
Drilling (days)
Logging (days)
Sea voyage from Balboa, Panama, to Hole 1256D, 823 nmi @ 10.5 kt
3.3


3645
Hole 1256D:
- Locate and reenter hole
- Temperature measurement
- Water sample
- Wireline logging


2.5

Rotary core (RCB) from 752 to 1360 mbsf

30.4


Wireline logging:
- Triple combo
- Formation MicroScanner–Dipole Sonic Imager
- Ultrasonic Borehole Imager
- GBM Magnetometer
- Well Seismic Tool


4.5
Sea voyage from Hole 1256D to Balboa, Panama, 823 nmi @ 10.5 kt
3.3



Subtotals:
6.6
30.4
7.0

Total operating days Expedition 309:

44.0






Sea voyage from Balboa, Panama, to Hole 1256D, 823 nmi @ 10.5 kt
3.3


3645
Hole 1256D:
- Locate and reenter hole
- Temperature measurement
- Water sample
Rotary core (RCB) from 1360 to 1960 mbsf

30.5


Wireline logging:
- Triple combo
- Formation MicroScanner–Dipole Sonic Imager
- Ultrasonic Borehole Imager
- GBM Magnetometer
- Well Seismic Tool


4.5
Sea voyage from Hole 1256D to Balboa, Panama, 823 nmi @ 10.5 kt
3.3



Subtotal:
6.6
30.5
4.5

Total operating days Expedition 312:

41.6






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