Take a look at the Topic 'saltwater Fly' on the left above this forum, the white writing on blue background.
My fly fishing for Bass has produced lots of Pollack and Mackeral!! I used a standard rod/line (Wt 8) from my dinghy in the Swellies just rowed into the maelstrom of the currents near the Perch and then left to its own devices whilst I cast. The dinghy is forced into the kelp and stays in the eddies, going round in circles! Very hairy particularly at night! Not foolhardy as currents keep small craft off the rocks! Well I'm still here aren't I! As for shore casting my technique not good enough except in still conditions. I have bought myself a two handed salmon rod second hand which helps in a wind but not really spent enough time at it in recent years. The trick I think is to find a spot over deepish water that sticks out into the sea near swift currents! Oh and full of fish on the surface. Let me know if you find one!