I have so many people pm`ed me about herring fishing , so I decided to share my knowledge here :
1) you must know how to tie bloodknot (a must)
2) you need to improvise with "flasher" (usually added at the bottom before weight or above)
3) need to have ul gear
4) must be ready for "combat" fishing
you will need a herring jig (usually 5-6 hooks) I prefer 6 hooks ones , I cut them at 3 pieces and I can get 3 setups from 1 jig ... berry`s sells them at 2.99-4.99 I would recommend mustad ones .
pretty much setup is kinda looks like bar rig , 2 hooks + weight at the bottom ... I use 1oz betty . difference is - you need to cast and retrieve , or you can use jigging knowledge . some people jigging up-down , I prefer sideways
from my experience , prime time is high tide/first light +-1hour (if no wind , or around 5kmh , its PRIME time )
catching herring is harder than catching pinks
so you should be ready for casting for a couple hours non stop
I hope this will help , feel free to pm me if you have more questions