What it is
The bomb is the quiet version of feeder fishing: an olive, bullet or pear lead, a hooklength, and a bait. You feed with a catapult, a PVA bag, or by throwing nothing at all on a baited spot.
It catches picky F1s, pressured carp, tench over a bed you put in earlier, and river fish in a crease when a feeder would snag. If you cannot be accurate without a feeder's weight, practise, or clip up with a slightly heavier bomb.