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Powerheads are often used for spear fishing and against sharks or alligators for sport, defense, or to kill nuisance animals. The term powerhead refers to the firearm-like part of the device; when attached to a shaft to form a spear , it may be referred to as a bang stick or shark stick .
Speargun Speargun in use by a diver. A speargun is a ranged underwater fishing device designed to launch a tethered spear or harpoon to impale fish or other marine animals and targets.
Powerhead (aquarium), a submersible aquarium pump; Powerhead (rocket engine), the preburners and turbopumps of a pump-fed rocket engine (excludes the engine combustion chamber and nozzle) Powerhead (pump), the mechanical drive of any one of several non-aquarium pump types; marine propeller powerhead, fountain powerhead, etc.
Polespear under tension with a cluster head attached. A polespear (hand spear or gidgee) is an underwater tool used in spearfishing, consisting of a pole, a spear tip, and a rubber loop.
An Inuit Kakivak tip. A kakivak is a leister used by Inuit for spear fishing and fishing at short range. It is comparable to a harpoon or a trident in function and shape. The kakivak is notable for its tip's design, which has three prongs, the outer which have their own teeth which point at the centre prong. [1]
An aquarium powerhead is typically used to create flow throughout the tank.For example, a single powerhead could be used at one end of a freshwater aquarium to simulate a laminar river current, or multiple powerheads can be positioned throughout the aquarium to create more turbulent flow.
The Spearfish torpedo (formally Naval Staff Target 7525) is the heavy torpedo used by the submarines of the Royal Navy.It can be guided by wire or by autonomous active or passive sonar, and provides both anti-submarine warfare (ASW) and anti-surface warfare (ASuW) capability.
The longbill spearfish (Tetrapturus pfluegeri) is a species of marlin native to the Atlantic Ocean where it is found above the thermocline in open waters between 40°N and 35°S. [1]