Data Trawler - Event Details

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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.

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