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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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