jerryn
Contributor
This happened to me recently in the South Pacific, no current, but poor visibility. We missed the upline as it was not on the wreck but in the sand off the wreck. Since there was no current, we blew the bag at 30', did out deco (about 25 minutes) and then surfaced. Not too far away from the boat. The boat knew where we were and was not concerned that we were not on the upline.
But if there is current, or suspected surface chop, or if you are on a rebreather, the boat is not going to track your bubbles. Then if you blow the bag at 30' or even 60' you may be too far away for the boat to see and at best you have set up a rescue situation. So with a current I would always blow the bag from the wreck, particularly with a decompression obligation.
Jerry
But if there is current, or suspected surface chop, or if you are on a rebreather, the boat is not going to track your bubbles. Then if you blow the bag at 30' or even 60' you may be too far away for the boat to see and at best you have set up a rescue situation. So with a current I would always blow the bag from the wreck, particularly with a decompression obligation.
Jerry