Table T2. Operations plan and time estimates for Leg 203.

Site	Location & Depth	Operations Description	Transit (days)	Drilling (days)	Logging (days)	On-site (days)
Balboa	8.57°N, 79.33°W	Transit from Balboa to proposed Site OSN-2, ~1899 nmi @ 10.5 kt	7.54
OSN-2	5°17.566'N, 110°04.579'W	Hole A: Cased reentry hole for multidisciplinary observatory
	Water depth = 3860 m	1. Geophysical survey and jet-in test.		1.33		1.33
		2. Set reentry cone and jet-in ~60 m of 20-in casing.		1.41		1.41
		3. Drilling to ~140 mbsf with 18.5-in tricone bit and set 16-in casing to ~130 mbsf.		3.12		3.12
		4. Drill out cement and casing shoe and RCB core in basement from 140 to 216 mbsf.		2.33		2.33
		5. Wireline logging from 130 to 216 mbsf.			1.77	1.77
		6. Drill 14.75-in hole from 130 to 216 mbsf and set 10.75-in casing to ~211 mbsf.		4.21		5.98
		Hole B: RCB coring and logging if time permits (see Table 3)
		Prepare for transit.		0.33		0.33
San Francisco	44.6°N, 125.1°W	Transit from proposed Site OSN-2 to San Francisco, ~2486 nmi @ 10.5 kt	9.87
		SUBTOTAL:	17.4	12.7	1.8	16.3
		TOTAL REQUIRED OPERATING DAYS:	31.9

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