Using this Seiko Prospex watch is quite simple. To set the time and date, just pull out the crown and turn it. For the stop - second hand function, you can use it to precisely time events. When wearing the watch, make sure the clasp is securely locked for safety. In terms of maintenance, keep it away from strong magnetic fields as they can affect the movement. Avoid exposing it to extreme temperatures. If the watch gets wet, dry it with a soft cloth. Have it serviced regularly by a professional watchmaker to keep it in top - notch condition.