Underwater pipeline workers have Magnetic Track lighting devices they can use as handles to keep them in place, even tie themselves off while they work. This means they don't have to worry about the prevailing tide pushing them out of the way, or making their life tough as they try to stay in position to do their underwater welding or inspections. In the case of working on a barge or ship with a steel hull, these types of devices are also quite prevalent as safety tools.