Table T2. Operations summary and time estimates for Expedition 305.

Site	Location	Water depth (mbsl)	Operations description	Transit (days)	Drilling (days)	Logging (days)
Ponta Delgada, Azores		Sea voyage from Ponta Delgada to Site AMFW-01A, 936 nmi @ 10.5 kt		3.7
AMFW-01A	30.170°N, 42.123°W	1630	Hole A: Bare rock spud, RCB 4.5 m cores 0–130 mbsf (3.1 days)
			Drop bit, log: triple combo, FMS/sonic, UBI (1.2 days)
			Hole B: HRRS hammer drill-in 22 m of 133/8 inch casing (1.9 days)
			Underream 143/4 inch hole with bicenter bit to ~130 mbsf (3.1 days)
			Run 120 m of 103/4 inch casing with MM and underreamer (1.7 days)
			Set retainer, cement 103/4 inch casing (0.9 days)
			Clean out cement, RCB 4.5 m cores 130–250 mbsf		4.2
			RCB 4.5 m cores 250–370 mbsf		4.1
			RCB 4.5 m cores 370–490 mbsf		3.8
			RCB 4.5 m cores 490–610 mbsf		4.3
			RCB 4.5 m cores 610–730 mbsf		4.4
			RCB 4.5 m cores 730–850 mbsf		4.4
			RCB 4.5 m cores 850–970 mbsf		4.5
			RCB 4.5 m cores 970–1090 mbsf		4.7
			RCB 4.5 m cores 1090–1100 mbsf		1.6
			Log: triple combo, FMS/sonic, magnetometer, UBI			2.5
			Vertical seismic profile Subtotal = 36.0 days			0.5
			Hole B: RCB 4.5 m cores 0 to ~26 mbsf Subtotal = 1.6 days		1.6
Ponta Delgada, Azores		Sea voyage from Site AMFW-01A to Ponta Delgada, 936 nmi @ 10.5 kt		3.7
			Subtotal:	7.4	37.6	3.0
			Total days:	48.0
			Alternate sites
AMFW-01A	~30.17°N, ~42.12°W	1630	HRRS hammer drill-in 22 m of 133/8 inch casing		1.9
			Underream 143/4 inch hole with bicenter bit to ~130 mbsf		3.1
			Run 120 m of 103/4 inch casing with MM and underreamer		1.7
			Run retainer, cement 103/4 inch casing		0.9
			Clean out cement, RCB 130–250 mbsf		3.8
			RCB 250–370 mbsf		3.8
			RCB 370–490 mbsf		3.8
			RCB 490–610 mbsf		3.9
			RCB 610–730 mbsf		4.0
			RCB 730–850 mbsf Subtotal = 31.0 days		4.1
			Drop bit; log: triple combo, FMS/sonic, magnetometer, UBI			2.5
			Vertical seismic profile Subtotal = 3.0 days			0.5
Footwall peridotite	~30.17°N, ~42.12°W	1630	RCB to bit destruction		3–5
			Subtotal = 3–5 days
Footwall peridotite	~30.17°N, ~42.12°W	1630	MDCB core –4.5 mbsf		1.8
			Subtotal = 1.8 days
AMHW-01A	~30.19°N, ~42.07°W	2580	RAB to bit destruction		3.0
			Subtotal = 3.0 days
			See additional alternate sites in Table T1.

Note: RCB = rotary core barrel, FMS = Formation MicroScanner, UBI = ultrasonic borehole imager, HRRS = hard rock reentry system, MM = mud motor, MDCB = motor-driven core barrel, RAB = resistivity at the bit.