Event details
| Voyage: | IN2020_V01 [details] |
| When: | 2020-03-02 14:42:05 UTC - entered into Elog/Everlog as 2020-03-02 14:42:05 |
| Log: | Updated Dredge in2020_v01 |
| Equipment: | Not specified |
| Position: |
Latitude: -33.158 Longitude: 101.2275
- entered into Elog as 33 09.48 S, 101 13.65 E |
| Dredge Number: | D21 |
| Wind Direction (deg): | 8.29 |
| Planned Heading (deg): | 100 |
| Dip Direction of Slope (deg): | 260 |
| Current Velocity (m/min): | 18 |
| Current Direction (deg): | 211 |
| WP2 Depth (m): | 4100 |
| WP3 Depth (m): | 3500 |
| Ellipsoidal Distance (metres): | 870 |
| Rise/Run (auto-filled): | 0.690 |
| WP3 Target Wire Out (m): | 4600 |
| Speed Through Water Average (WP1 to WP2) (knots): | 0.5 |
| Speed Over Ground Average (WP2 to WP3) (knots): | 1.6 |
| WP3 Actual Wire Out (m): | 4558 |
| Ship speed at retrival (knots): | 0.2 |
| Ship speed at retrival (m/min) (auto-filled): | 6.17 |
| Retrival Wire Speed (m/min): | 15 |
| Wire Out at First Tension Spike (m): | 4599 |
| Tension Max (Tonnes): | 12.2 |
| Hung Up: | Yes |
| Wire Out Off Bottom (meters): | 3450 |
| Overall Operation Rating: | 7 |
| Completion Time: | 08 |
| Attachment: | 200302_145104_D21_start_of_dredge.JPG,200302_182233_D21_grafana_retrieval_of_dredge.JPG |
| Dredge in water 14: | 42. ship at 101.228,-33.159. Using stop-and-drop deployment technique. |
| Paying out 60m/min at 14: | 48. |
| Dredge on bottom at 15: | 56. |
| Begin hauling in 15m/min at 16: | 22, ship at 101.238,-33.159. Ship depth at 3383m. |
| Tension spikes: | 45; |
| Dredge off bottom at 17: | 08. Full bag. |
| Comments: | Dredge in water 14:42. ship at 101.228,-33.159. Using stop-and-drop deployment technique. WP2 (ie. planned dredge start) position is 33 09.55S, 101 13.72E. Paying out 60m/min at 14:48. Dredge on bottom at 15:54, wire out 4060m, ship at 101.229,-33.159. Paying out 30m/min at 15:56. Begin hauling in 15m/min at 16:22, ship at 101.238,-33.159. Ship depth at 3383m. Tension spikes: 10.4t at 16:23; 10.5 at 16:25; 10.9 at 16:27; 10.8 at 16:30; 10.6 at 16:32; 10.8 at 16:34; 10.6 at 16:37; 11.6 at 16:40; 11.2 at 16:42; 11.1 at 16:44; 11.8 at 16:46; 11.9 at 16:47; 11.8 at 16:49; 11.4 at 16:51; 12 at 16:53; 11.18 at 16:55; 11.2 at 16:57; 11.9 at 16:58; 12.2 at 16:58; (hook up at 16:58, sustaining ~12.2t)...slowly moving SWwards back over dredge trajectory...17:22 looks to be unhooked (wire out 3980m) - continue dredging; 11.1 at 17:23; 11 at 17:27; 11.4 at 17:30; 11 at 17:33; 11.3 at 17:34; 11.2 at 17:37; 11.4 at 17:40; 11.5 at 17:45; Dredge off bottom at 17:56. Dredge at surface at 19:00. Dredge on deck at 19:08. Full bag. |