The Marconi Lifeguard is a maritime alarm receiver designed to automatically monitor distress frequencies for alarm calls from ships in distress. Up on receipt of an alarm, the unit will sound an alert in the radio room, the radio officer's quarters and on the bridge so that all necessary crew members are alerted to the distress.
The unit has not been powered up, from the pictures below it can be seen that there are some relays missing as well as a valve.
