Magnet fishing
Magnet fishing, also called magnetic fishing, is searching in outdoor waters for ferromagnetic objects available to pull with a strong neodymium magnet.
Practitioners
In English, people who practice magnet fishing may be called magnetfishers or magneteers.It is thought magnet fishing was initially started by boaters using magnets to recover fallen keys from the water. Magnet fishing as a hobby began to take off in the early 2000s starting in Europe.
Objects recovered
Magnet fishing can recover metal debris such as discarded bicycles, guns, safes, bombs, grenades, coins, and car tire rims from bodies of water, but many who engage in the hobby hope to find rare and valuable items as well.Tools
Magnet fishing is typically done with a strong neodymium magnet secured to a durable rope between, and sometimes a grappling hook as a supplement to the magnet. For safety it is recommended to also use a pair of gloves to protect your hands from any sharp objects you may pull up with your magnet.Potential harms
Some magnet fishers have retrieved dangerous objects, including loaded guns, unexploded ordnance, and sharp pieces of metal.Neodymium magnets are powerful and can interfere with pacemakers, posing a health risk; they can also damage other electronic devices. Fingers can get crushed between the magnet and a piece of metal, potentially causing serious bodily harm. Tetanus can also be a risk for those without an up-to-date tetanus vaccine.
In general, police urge those who find weapons or similar items to contact them.
Magnet fishing and the law
Depending on the jurisdiction, anything of value may belong to the local government, not the finder.Belgium
Amateur magnet-fishers in Belgium helped the police by recovering new evidence, specifically firearms and ammunition, related to the crimes of the Brabant killers.France
The rules of magnet fishing are the same as those governing the detection of buried objects:"No one may use equipment capable of detecting metallic objects for the purpose of searching for monuments and objects likely to be of interest to prehistory, history, art or archaeology without first obtaining an administrative authorisation issued in accordance with the applicant’s qualifications and the nature and manner of the search".