I head out into 1100ft of water, look for a return on the sounder at around 300-500ft (hake) and then jig below that. I find most of the time im getting them 3/4 to 1/2 of the way down. but start at the bottom and do tiny jigs for some action, 10 sec pause, followed by a "set the hook. jig" if you dont feel like you snagged something then wind up 10 cranks and repeat. If you feel extra drag when you set the hook, keep reeling and dont stop at all. you must keep tension alll the way up. alllllllllll the way up! Often, just before you hook up you might be asking yourself was that a take?, or oh I think I felt something.... its a very ginger take, soft, subtle.... happy hunting!
oh and I should add, slack tides and no winds. lines need to be going straight up and down. sea anchors or buckets help in marginal conditions.