I started my salmon fishing in the upper part of michigan and yes we us box's there. the settings are a little less. I once read that for deep brown trout the settings have to be fine tuned even more.....one interesting thing is I have a little boat and no black box here and I stood up one day and looked over the side and there must have been 15 dog fish following behind each cable so I must be putting out some charge that they find attractive. I still manage to catch salmon in the salt......DJ