Table T24. Remotely operated vehicle tasks to start the NEREID system.
Step
|
Task
|
|---|---|
| 1 | Dive with the BOB unit |
| 2 | Locate Holes 1150C and 1150D |
| 3 | Check the status of the Hole 1150C reentry cone area |
| 4 | Locate the ROV UMC parking position on the PAT |
| 5 | Locate the SAM on the PAT |
| 6 | Open the top lid of the SAM |
| 7 | Insert the BOB to be able to communicate with the SAM via infrared link |
| 8 | Locate, pull out, and retrieve the ROV UMC dummy receptacle from the top of the MEG |
| 9 | Pull out pins binding oil-fill cable on the PAT top surface |
| 10 | Pull out the ROV UMC and bring over to the furthest side to face the MEG |
| 11 | Insert the ROV UMC to automatically start the system |
| 12 | Wait 20 min after completion of connection |
| 13 | Check the LED status on the BOB |
| If successful | |
| 14a | Surface and wait 1-2 days for the BOB to recover data |
| 15a | Dive and retrieve the BOB |
| 16a | Close lid on the SAM |
| 17a | Surface |
| If unsuccessful | |
| 14b | Retrieve the BOB |
| 15b | Surface |
| 16b | Recover the SAM |
| Cut the string attached to the SAM release lever | |
| Remove the hat (BOB holder) on the SAM | |
| Move the lever to release the SAM connector | |
| Pull out the SAM with 20 kg force | |
| 17b | Surface and check the SAM |
| 18b | Refurbish the SAM |
| 19b | Dive with the SAM and BOB |
| 20b | Insert the SAM using the guide on the PAT |
| 21b | Place the BOB on top of the SAM |
| 22b | Go to Step 12 |
Note: BOB = back from ocean bottom module, ROV = remotely operated vehicle, UMC = underwater mateable ROV connector, SAM = storage acquisition module, PAT = power supply access terminal, LED = light emitting diode.