I have recently located a box of old squid jigs in my house, they look a bit like the following:

They are very heavy, and i am allmost possitive you can not fish with them from the shoreline since they sink so quickly. I casted one of them out, and before i could start reeling the jig back in, it had allready caught to the grass.
I own a boat here in croatia, and would love to try squid fishing with these jigs. Im not sure if i could troll with them, are their any other methods to catching squid with them?
Thank you very much,