if you are talking about the things that look like spiky balloons, they are used to destroy boats that bump into them. they are mainly used for war and protection purposes.
From Mines and Underwater
Dolphins have been trained by some militaries for tasks such as locating mines, guarding ships, and assisting with underwater surveillance. They are known for their echolocation abilities and are able to navigate complex underwater environments with ease. However, the use of dolphins in warfare is controversial due to animal welfare concerns.
Round with spikes
W-I-T-C-H- - 2004 The Underwater Mines 1-19 was released on: USA: 13 June 2005
* Some firearms work underwater * Torpedoes * Depth charges * Edged weapons (knives, spears, spear guns, tridents) * Mines * Explosives ANSWER: Bang stick (a shotgun shell on a pole) is another.
True
Diamond mines are used for mining diamonds.
The military uses sonar technology for various purposes such as detecting submarines, underwater mines, and other objects in the water. Sonar systems emit sound waves that bounce off objects underwater, allowing the military to gather information on the environment and potential threats beneath the surface. Sonar is also used for navigation and communication underwater.
Depth charges or Influence mines, both highly hazardous to submarine-and fish.
HBX-3 is an explosive mixture of RDX, TNT, powdered aluminum, calcium chloride, and a special wax. It's used mostly in warheads that are carried by submarines and in underwater mines and depth charges.
Ponies were used in the mines. Since large draft horses were to big to fit in the mines, they used ponies to carry tools and pull the mining carts.
Yes. Underwater can be used as an adjective and an adverb. adjective: underwater expedition adverb: swim underwater