Event details
| Voyage: | IN2020_V01 [details] |
| When: | 2020-03-01 18:37:50 UTC - entered into Elog/Everlog as 2020-03-01 18:37:50 |
| Log: | Updated Dredge in2020_v01 |
| Equipment: | Not specified |
| Position: |
Latitude: -33.76683 Longitude: 101.92233
- entered into Elog as 33 46.01 S, 101 55.34 E |
| Dredge Number: | D20 |
| Wind Direction (deg): | 4.33 |
| Planned Heading (deg): | 090 |
| Dip Direction of Slope (deg): | 250 |
| Current Velocity (m/min): | 2 |
| Current Direction (deg): | 172 |
| WP2 Depth (m): | 3680 |
| WP3 Depth (m): | 3000 |
| Ellipsoidal Distance (metres): | 1200 |
| Rise/Run (auto-filled): | 0.567 |
| WP3 Target Wire Out (m): | 4500 |
| Speed Through Water Average (WP1 to WP2) (knots): | 0.1 |
| Speed Over Ground Average (WP2 to WP3) (knots): | 0.7 |
| WP3 Actual Wire Out (m): | 4500 |
| Ship speed at retrival (knots): | 0.3 |
| Ship speed at retrival (m/min) (auto-filled): | 9.26 |
| Retrival Wire Speed (m/min): | 15 |
| Wire Out at First Tension Spike (m): | 4497 |
| Tension Max (Tonnes): | 11.9 |
| Hung Up: | Yes |
| Wire Out Off Bottom (meters): | 2970 |
| Overall Operation Rating: | 7 |
| Completion Time: | 21 |
| Attachment: | 200301_190206_D20_start_of_dredge.JPG,200301_222333_D20_grafana_start_haul-in.JPG,200301_235621_D20_grafana_retrieval_of_dredge.JPG |
| Dredge in water at 18: | 38, stop-and-drop deployment technique. |
| Wire paying out at 60 m/min at 18: | 43. |
| Dredge at 3680m wire out ;at 19: | 40. |
| Start hauling in 15m/min at 20: | 43. |
| Tension spikes: | 11 (wire out 3060m); |
| Dredge off bottom at 23: | 17, wire out 2970m, water depth 3100m, ship at 101.926,-33.759. |
| Dredge on deck at 00: | 21; Dredge 3/4 full. |
| Comments: | Dredge in water at 18:38, stop-and-drop deployment technique. Planned WP2 (dredge on botttom) position is 101 55.34,-33 46.0. Wire paying out at 60 m/min at 18:43. Dredge at 3680m wire out at 19:44, ship 101.92,-33.76. Paying wire out at 15m/min. Dredge looks to be on bottom at 19:46 (ie inflection point in tension line). Paying out at 20 m/min at 20:24. Paying out 10m/min at 20:38, 5m/min at 20:40. Start hauling in 15m/min at 20:43. Tension spikes: 10t at 20:45 (winch problem so stopped hauling in); restarted at 20:51 at 10m/min then 15m/min; 9.2 at 20:54; 9.9 at 21:02; 9.5 at 21:04; 10.2 at 21:09; 9.5 at 21:12; 10.2 at 21:14; 10.6 at 21:15; 10.5 at 21:17; 10.4 at 21:19; 10 at 21:23; 9.7 at 21:28; 10.4 at 21:29; 10.7 at 21:30; 10.3 at 21:32; 10.4 at 21:33; 10.5 at 21:34; 10.6 at 21:35; 10.9 at 21:36; 11.7 at 21:38; 11.4 at 21:39; 11.5 at 21:41; 10.5 at 21:44; 10.8 at 21:45; 11.8 at 21:46; 11.9 at 21:47; 10.3 at 21:50; 11.8 at 21:52 - hook up (wire out ~3580m); ship moving W-SWwards down the dredge-slope in attempt to unhook...appears to be unhooked at 22:30 (wire out ~3520m)-recommence haul-in at 15m/min; 10 at 22:41; 11.4 at 22:59 - hookup (wire out ~3100m)...ship moving W-SWwards down the dredge-slope in attempt to unhook...appears to be unhooked at 23:11 (wire out 3060m); Dredge off bottom at 23:17, wire out 2970m, water depth 3100m, ship at 101.926,-33.759. Dredge on deck at 00:21; Dredge 3/4 full. |