Event details
Voyage: | IN2020_V01 [details] |
When: | 2020-02-18 14:29:21 UTC - entered into Elog/Everlog as 2020-02-18 14:29:21 |
Log: | Updated Dredge in2020_v01 |
Equipment: | Not specified |
Position: |
Latitude: -32.55317 Longitude: 95.84
- entered into Elog as 32 33.19 S, 95 50.4 E |
Dredge Number: | D14 |
Wind Direction (deg): | 108 |
Planned Heading (deg): | 030 |
Break of Slope (deg): | 110 |
Current Velocity (m/min): | 6 |
Current Direction (deg): | 347 |
Speed Through Water Average (WP1 to WP2): | 1.3 |
Speed Over Ground Average (WP2 to Retrival Start/WP3): | 1.8 |
Run-in Factor: | 1.0 |
Distance Deployment (WP1) to WP2 (WP2 depth * run-in factor): | 4965.00 |
Target Wire Factor: | 1.2 |
WP2 Target Scope (WP2 Depth * Wire Factor): | 5958.00 |
Actual wireout at dredge retrival (WP3) start: | 5955 |
Ship speed at retrival (knots): | 1.0 |
Ship speed at retrival (m/min): | 30.87 |
Retrival Wire Speed (m/min): | 15 |
First Tension Spike Scope: | 12 |
Tension Max (Tonnes): | 14.5 |
Hung Up: | Yes |
Overall Operation Rating: | 5 |
Completion Time: | 40 |
Attachment: | 200218_163951_D14_start_of_dredge_haul.JPG,200218_192410_D14_retrieval_of_dredge.JPG |
Target dredge-on-bottom (WP2): | 95 51.693, -32 31.296 at depth 4965m |
Dredge in water 14: | 29 at 95.840,-32.553 depth 5180m |
14: | 34 begin payout 60m/min |
Ship on WP2 ; about 15: | 56 (wire out 4940m), depth 4966m |
Dredge on bottom 15: | 57, begin pay out 30m/min |
Wire out max 5958m at 16: | 30 depth 4031m |
High tension at start of haul in so waiting on haul in operation. Haul in re-start at 16: | 41 |
Tension spikes 13.3t (16: | 00)...tracking down slope average speed of 1.5-1.6 knts.... |
Winch problems 18: | 08 (95.863,-32.523) as commence haul in at 30m/min. |
Haul in 60m/min commenced at 19: | 12. |
Dredge at water surface 20: | 40. |
Comments: | Target dredge-on-bottom (WP2): 95 51.693, -32 31.296 at depth 4965m Dredge in water 14:29 at 95.840,-32.553 depth 5180m 14:34 begin payout 60m/min Ship on WP2 about 15:56 (wire out 4940m), depth 4966m Dredge on bottom 15:57, begin pay out 30m/min Wire out max 5958m at 16:30 depth 4031m High tension at start of haul in so waiting on haul in operation. Haul in re-start at 16:41 Tension spikes 13.3t (16:42); 14.4 (16:45); 14.5 (16:50);14 (17:10); 14 (17:13); 14 (17:21) - hookup (5360 wire out)...hauling in slowly...tracking slowly down the dredge track (ie slope) to try to loosen it (18:00)...tracking down slope average speed of 1.5-1.6 knts.... Winch problems 18:38 - hauling wire back out. Starting to haul in (15m/min) at 19:00. Possibly off bottom 19:08 (95.863,-32.523) as commence haul in at 30m/min. Haul in 60m/min commenced at 19:12. Dredge at water surface 20:32 - onboard 20:40. |