The Furuno BR550 Timer Reset Panel is waterproof and used if the class requires installation on bridge wings. There is a flashing alarm and a reset LED. You can use as many as 6 timer reset panels, including the indoor timer reset panels (BR530) with your BR500 BNWAS Bridge Navigation Watch Safety System. The Furuno BR550 Waterproof Timer Reset Panel Cabin Alarm Panel works in conjunction with the Furuno BR500 BNWAS Bridge Navigation Watch Safety System on the bridge wings. This is a safety feature and required for all IMO vessels, mandated by regulation MSC.128(75). .