Posted on this subject about a year ago,still using divers but IMHO downriggers are the way to go.

Used a small cabela's depth and temp.guage tied in line to get the results,2.5 to 3 mph in 3 to 4ft. swells.

Power pro 60# test main line.

Deep six #2, 50ft. out about 23ft. down
100ft.out about 43ft.down, Double deep six,150 out about 88ft. down

Keeps me in the silvers and near shore chinook. Have been looking at the scotty 1090 strongarm downriggers.