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Table T3. Summary of coring bits used during Expedition 309.
Bit number
Manufacturer
Serial number
Bit type
Size
Number of cores
Interval cored (m)
Recovered (m)
Recovery (%)
Coring time (h)
Rate of penetration (m/h)











Log bit



Logging



43.8
1256D-1
 		RBI
 		BF-739
 		CC-9
 		97/8
 		11
 		69.1
 		25.20
 		36.5
 		51.7
 		1.34
1256D-2
 		RBI
 		BF-852
 		CC-9
 		97/8
 		11
 		76.8
 		18.02
 		23.5
 		52.1
 		1.47
1256D-3
 		RBI
 		BF-854
 		CC-9
 		97/8
 		11
 		61.1
 		14.85
 		24.3
 		52.8
 		1.16
1256D-4
 		RBI
 		BF-856
 		CC-9
 		97/8
 		4
 		20.4
 		9.52
 		46.7
 		17.8
 		1.14
1256D-5
 		RBI
 		BF-858
 		CC-9
 		97/8
 		15
 		72.1
 		20.56
 		28.5
 		50.1
 		1.44
1256D-6
 		RBI
 		BF-741
 		CC-9
 		97/8
 		12
 		57.6
 		21.45
 		37.2
 		50.8
 		1.13
1256D-7
 		RBI
 		BF-742
 		CC-9
 		97/8
 		8
 		36.3
 		17.70
 		48.8
 		42.5
 		0.85
1256D-8
 		RBI
 		BF-853
 		CC-9
 		97/8
 		12
 		58.6
 		17.74
 		30.3
 		57.8
 		1.01
1256D-9
 		RBI
 		CL-540
 		CC-9
 		97/8
 		12
 		51.3
 		37.57
 		73.2
 		53.1
 		0.97
Log bit



Logging



76.0
Totals:
96
 		503.3
 		182.61

1.17











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