To find the depth at a particular location in a swim. Normally an area you plan to fish or maybe a set depth such as 18″ you’re trying to find in a margin where you suspect the fish will want to be.
To find the depth at a particular location in a swim. Normally an area you plan to fish or maybe a set depth such as 18″ you’re trying to find in a margin where you suspect the fish will want to be.