Well, even before anything was announced (or rather, hinted and found out), I had two ideas about what could be fishing equipment:

1. Sonars, since they could detect the fish under water.

2. Drum canisters, because you need something to store the fish you caught. Maybe even a canister filled with fish, since you want fresh fish.

So yeah, I think it's not that far-fetched to think it could be effective, though apparently, it isn't.

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