DIVE PLAN Leg 1 Dive 11 Recover Wally 1

Transcription

1 DIVE PLAN Leg 1 Dive 11 Recover Wally 1 Page 1 of 6 Location: Barkley Canyon Date: 9 May, :00 Constraints: Weather, Sufficient deck space ROV Dive # OE 114 Objectives Prepare Wally I cable for recovery Visual inspection of Hydrates IP Reroute Wally track Inspect shell & wood experiments Recover Wally 1 Dive Dependents 1. Line laser and ROV porch grating orientation with respect to ROV heading 2. Wally 1 has been moved to Waypoint #18 Ship Procedure 1. Transit to site, assess weather and sea state. Proceed only when it is safe to do so 2. Deploy ROV USBL pole ACTION LATITUDE LONGITUDE DEPTH (m) Descend at Barkley Hydrates IP 48 o o Ascent at Barkley Hydrates IP 48 o o Shore Procedure 1. Monitor Twitter feed Communications With Shore 1. On-board team will tweet twitter account at the beginning of the dive 2. Post the dive plan on the cruise website 3. On-board team will use intercom during operations as required Navigation 1. Record positions of the deployed platforms and satellite instruments 2. Guide visual transect 3. Record interesting positions Dive Chief 1. Record deviations from dive plan 2. Record change to site layout diagrams 3. Confirm direct communication between scientists and ROV pilot Site/Equipment IDs

2 ACTION SITEID SITENAME Disconnect Hydrate_IP_ DEVICE ID y-ip_ Page 2 of 6 DEVICENAME LATITUDE LONGITUDE DEPTH PORT EXT CABLE BC Hydrate JB ' ' 870 IA (switch) J plus light y-ip_ y-ip_ Port Manager y-ip_ y-ip_ y-ip_ Tilt-Compensated Heading Module TCM on Franatech METS Methane Sensor G051-E273 on ADM CTD 110 on Seapoint Turbidity y-ip_ Meter on ' ' 860 Nortek Aquadopp y-ip_ y-ip_ y-ip_ y-ip_ y-ip_ Profiler AQD 9917 Panasonic Webcam WV- SC384 KDV11977 on Panasonic Webcam WV- SC384 1KBXM on Wet-Labs Fluorometer 1543 on Franatech METS Methane Sensor G74-E287 on Reference Way Point # Reference Way Point # Reference WW 9_ ' ' 867 Reference WW 14_ ' ' 862 Reference WW 15_ ' ' 870 Reference WW 16_ ' ' 862 Reference WW 18_ ' ' 860 Install WW 21_2014 Install WW 22_2014 Install WW 23_2014 Install WW 24_ / 101.EX.019 1

3 Page 3 of 6 Install WW 25_2014 ROV/Equipment Requirements lengths of chain with carabineers on Wally deployment top, to weigh down Wally cable 2. Checkerboard frame for camera calibration. (Special one for Wally's camera calibration) 3. Double carabineer for Wally strain relief on platform 4. Eight new Wallyland markers (#21, #22, #26, #27, #28, #29, #30, #31) 5. Three Wally Camera Road signs (#23, #24, #25) 6. Knife/cutter for strain relief. 7. Milk Crate on front of ROV 8. ROV rigged for platform recovery ROV Procedure Descent 1. Start recording, start streaming video to UVic, start dive log, confirm both are being received 2. Descend ROV at Barkley Hydrates IP to landing zone. Care must be taken watching for Wally tether Wally 1 cable recovery preparations 1. Transit to Wally cable 2. Weigh down Wally cable using carabineer chains 3. Transit to Barkley Hydrates IP Visual IP Inspection 1. Locate IP and take a visual of the frame and instruments from all sides, checking for any potential issues: a. Ground anode connected to JB b. Sediment build-up on platform and feet c. Bungees, rope, and cable ties d. Galvanized hardware and brackets (JB hardware and brackets) e. Cables, specifically in areas with potential wear f. JB connectors g. IP uplink cable 2. Evaluate cables (uplink and downlink) in vicinity of IP to get a sense of landing zone tolerances for connectivity on future redeployment Reroute Wally Track 1. Fly to Wallyland marker #10 2. Follow Wally tracks heading East for 2 metres 3. Place Road Sign WW 24_2014 (4 circular symbols) 1 metre north of the existing tracks. Symbols on sign should be facing South East 4. Record position of WW 24_ Deploy new marker #21 1 metre north of Road Sign WW 24_ Record position of new marker #21 7. Fly to Wallyland marker #14 and then head north to most northern Wally tracks 8. Place Road Sign WW 23_2014 (Checkerboard) 1 metre north of the existing tracks. Checkerboard symbol should be facing South 9. Record position of WW 23_ Deploy new marker #27 1 metre north of Road Sign WW 24_2014

4 Page 4 of Record position of new marker #27 Follow Wally tracks heading South East until the tracks bend sharply to the South. Stop at this point Place Road Sign WW 25_2014 (16 small circular symbols) 1 metre North of the existing tracks. Symbols on sign should be facing North West Record position of WW 25_2014 Deploy new marker #31 1 metre north of Road Sign WW 25_2014 Record position of new marker #31 Turn around, follow existing tracks, and deploy new markers #30, #29 and #28 between #31 and #27/WW 23_2014 (Checkerboard), either spaced evenly or at strategic turns of the track Record positions of new markers #30, #29 and #28 Continue to follow existing tracks past Checkerboard, and deploy new markers #26 and #22 between #27/WW 23_2014 (Checkerboard) and #21/WW 24_2014 (Road sign with large symbols), either spaced evenly or at strategic turns of the track Wally Camera Road Signs WW 23_2014, WW 24_2014, WW 25_2014 Inspection of Mairi s Shell & Wood Experiments. 1. Navigate to Markers #9 & #16. (Numbers from Mairi) 2. Video wood and shells as directed by Mairi Best (overview and close-ups) Recover Wally I 1. System confirm powered down JB-07 port J7 2. Disconnect Wally from Port J7 on IP 3. Disconnect strain (kellum) relief between Wally cable and IP 4. Plug dust cap into connector port 5. Place cable end next to Wally and secure

5 Ascend 1. Request permission for recovery from Bridge 2. Connect Wally 1 to ROV platform recovery line 3. Recover ROV 4. Recover Wally 1 once ROV secured Page 5 of 6

6 Page 6 of 6 Post Dive Sample Handling Core samples Staff Scientist responsible: Fabio De Leo