Table T21. Remotely operated vehicle tasks to start the NEREID-191 system, Site 1179.
|
Step
|
Task
|
|---|---|
| 1 | Activate the NEREID observatory |
| 1.1 | Dive with the SAM-191 and the SAM-ROV interface |
| 1.2 | Locate Hole 1179E |
| 1.3 | Check the status of the Hole 1179E reentry cone area |
| 1.4 | Check the status of the instruments and cables on the PAT |
| 1.5 | Replace the SAM-191 dummy for the SAM-191 |
| 1.5.1 | Land the ROV on the top of the PAT |
| 1.5.2 | Put the SAM-191 on the top of the PAT temporarily |
| 1.5.3 | Cut the ropes fixing the SAM dummy to the SAM seating frame |
| 1.5.4 | Remove the SAM dummy from the SAM seating frame |
| 1.5.5 | Grip the SAM-191 and place it on the SAM seating frame |
| 1.6 | Make the connection between the MEG-191 and the PAT |
| 1.6.1 | Remove the trigger pins fixing the ROV jumper cable to the top of the PAT |
| 1.6.2 | Move and land the ROV at the ROV-UMC parking position |
| 1.6.3 | Remove the ROV-UMC from its parking position |
| 1.6.4 | Move the ROV to the front side of the MEG-191 by gripping the ROV-UMC |
| 1.6.5 | Insert the ROV-UMC to the UMC on the top of the MEG-191 |
| 1.7 | Check the status of the NEREID observatory |
| 1.7.1 | Land the ROV by the SAM-191 on the top of the PAT |
| 1.7.2 | Remove the dummy plug from the UMC on the SAM-191 |
| 1.7.3 | Connect the SAM-ROV interface with the SAM-191 |
| 1.7.4 | Make an RS232C connection between the SAM-191 and computer on the surface |
| 1.7.5 | Check the status of the system |
| 1.7.6 | Disable the connection between the SAM-191 and the computer |
| 1.7.7 | Remove the SAM-ROV interface from the SAM-191 |
| 1.7.8 | Put the dummy plug on the UMC of the SAM-191 |
| 1.7.9a | If there is no problem with the system: |
| 1.7.9a.1 | Go back to the surface and wait 1-2 days for the SAM-191 to record data |
| 1.7.9a.2 | Go to step 2 (data recovery) |
| 1.7.9b | If there is a problem with the system: |
| 1.7.9b.1 | Cut the string fixing the releasing lever for the SAM-191 to the PAT |
| 1.7.9b.2 | Remove the SAM-191 from its seating frame using the releasing lever |
| 1.7.9b.3 | Place the SAM-191 on the PAT temporarily |
| 1.7.9b.4 | Insert the dummy SAM to the SAM seating frame |
| 1.7.9b.5 | Bring the SAM-191 to the surface |
| 1.7.9b.6 | Check the system of the SAM-191 |
| 1.7.9b.7 | If something is wrong with the SAM-191, replace it with another one |
| 1.7.9b.8 | Dive with the SAM-191 and the SAM-ROV interface |
| 1.7.9b.9 | Go to step 1.5.1 |
| 2 | Data recovery |
| 2.1 | Prepare the SAM-191 |
| 2.2 | Dive with the SAM (new) and the SAM-ROV interface |
| 2.3 | Locate Hole 1179E |
| 2.4 | Replace the SAM-191 |
| 2.4.1 | Land the ROV by the SAM-191 on the top of the PAT |
| 2.4.2 | Place the SAM (new) on the PAT temporarily |
| 2.4.3 | Remove the SAM-191 from its seating frame using the releasing lever |
| 2.4.4 | Place the SAM-191 (previous one) on the PAT temporarily |
| 2.4.5 | Grip the SAM-191 (new) and insert it to its seating frame |
| 2.4.6 | Go to steps 1.7.2-1.7.8 |
| 2.4.7a | If there is no problem with the system: |
| 2.4.7a.1 | Grip the SAM-191 (previous one) and return to the surface |
| 2.4.7b | If there is a problem with the system: |
| 2.4.7b.1 | Leave the SAM-191 (new) in its seating frame |
| 2.4.7b.2 | Grip the SAM-191 (previous one) and return to the surface |
| 2.4.7b.3 | Analyze the data from the SAM-191 (previous one) and work out countermeasures |
| 3 | Recovery of the DL |
| 3.1 | Dive after confirmation that the NEREID observatory works well |
| 3.2 | Locate Hole 1179E |
| 3.3 | Land the ROV by the DL on the top of the PAT |
| 3.4 | Remove the trigger pins fixing the DL to the PAT |
| 3.5 | Grip the rope of the DL and return to the surface |
Note: SAM = storage acquisition module, ROV = remotely operated vehicle, PAT = power access terminal, MEG = multiple-access expandable gateway, UMC = underwater mateable connector, DL = data logger.