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.