In a situation when the person is under the water the main thing would be to detect one as quickly as possible. If people feel that they cannot swim out, they start panicking, they feel at lost and do not know what to do. Consequently, in this situation, it is necessary to quickly send out a signal for help, which is very difficult to do, while being under a layer of water. A drowning man can help himself by designating his location under the water. Thereby, it will reduce the time of searching and make it possible to provide assistance on time. In order to do this, the OSMI bracelet should just be stripped off a hand in a critical situation, so that the paint solution will immediately mix up with the water, forming a spot on the surface of the water and showing the location of a person.