Wondering if anyone had any sneaky.ideas for how to figure out water depth when casting off shore I.e. no electronics. I just had an idea to tie a 3lb sinker and throw a big bobber only strung thru one side so it can slide easily. Cast out and let sinker do its work, then pull line in slowly and measure distance between sinker and bobber. Any1 every try this? Either way ill try next time I go out (maybe this afternoon) will repost results