Site HE-1A Summary | Table of Contents
| Leg 197 Operations Plan and Time Estimate | |||||||
| Option 3 | |||||||
| Site | Location | Water | Operations Description | Transit | Drilling | Logging | Total |
| No. | Lat/Long | Depth | (days) | (days) | (days) | On-site | |
| (mbrf) | |||||||
| Yokohama | 35°16.80'N | Transit 1552 nmi from Yokohama, Japan, to Site HE-3B @ 11.0 kt | 5.9 | ||||
| 139°23.40'E | |||||||
| HE-3B | 50°48.60'N | 2740 | Drill ahead through sediment with a center bit to 300 mbsf | 8.1 | 1.2 | 9.3 | |
| 167°33.00'E | RCB in sediment from 300 to 450 mbsf | ||||||
| RCB from 450 to 600 mbsf (150 m into basement) using | |||||||
| FFF for one bit change | |||||||
| Wireline logs (Triple combo, Mag Tool, and FMS) | |||||||
| Transit 11 nmi from Site HE-3B to Site HE-3A @ 11.0 kt | 0.0 | ||||||
| HE-3A | 50°57.00'N | 2773 | Drill ahead through sediment with a center bit to 300 mbsf | 8.2 | 0.8 | 9.0 | |
| 167°44.40'E | RCB in sediment from 300 to 500 mbsf | ||||||
| RCB from 500 to 650 mbsf (150 m into basement) using | |||||||
| FFF for one bit change | |||||||
| Wireline logs (Triple combo and FMS) | |||||||
| Transit 580 nmi from Site HE-3A to Site HE-4B @ 10.5 kt | 2.3 | ||||||
| HE-4B | 41°29.00'N | 1300 | RCB to 200 mbsf (160 m into basement) | 5.1 | 0.6 | 5.7 | |
| 170°38.00'E | Wireline logs (Triple combo and FMS) | ||||||
| Transit 200 nmi from Site HE-4B to Site HE-5C @ 10.5 kt | 0.8 | ||||||
| HE-5C | 38°09.50'N | 1480 | RCB to 220 mbsf (160 m into basement) | 5.3 | 0.6 | 5.9 | |
| 170°50.00'E | Wireline logs (Triple combo and FMS) | ||||||
| Transit 201 nmi from Site HE-5C to Site HE-6A @ 10.5 kt | 0.8 | ||||||
| HE-6A | 34°58.94'N | 1331 | RCB to 240 mbsf (160 m into basement) | 5.0 | 0.6 | 5.6 | |
| 172°08.98'E | Wireline logs (Triple combo and FMS) | ||||||
| Yokohama | 35°16.80'N | Transit 1640 nmi from Site HE-6A to Yokohama, Japan @ 10.0 kt | 6.8 | ||||
| 139°23.40'E | |||||||
| TOTAL: | 16.5 | 31.7 | 3.8 | 35.5 | |||
| TOTAL DAYS: | 52.0 | ||||||