The fishing for trout with sbirulinos or bombardas gets more and more popular. The bombarda floats are not really a bite indicator. They are more an additional weight for long distance casts. Sbirulinos are actually underwater floats. There are several models available. Sinking, half sinking and floating. The rigging is simple - see below drawing. Sbirulinos are used together with special long leaders and hookbait which turns nicely when retrieving.