imo
up here it's not nessasary. down south the water is ALOT warmer. thats whear we use it. off nantucket etc.. i have the 150$ oceantemp {and so do my buds who have my password}
there isn't big temp breaks up here.everything seems to stay about the same temp offshore. 2-3 degree breaks are about the norm .
i think everything is more structure oriented. stellwagen jeffreys etc..
find the bait/structure--find the fish.
only game in town is either bluefin who move like 60 miles a day or bluesharks,,occasionally makos and threshers but not nearly as many as south of the cape.