Draft
25
Routine System Tasks
Mobilarm Ltd. © 2009
7
Managing Alarms
Mobilarm Crewsafe raises a vessel-wide alarm to notify crew of an emergency situation.
The following sections explain the management of:
·
, which are automatically activated during man
overboard events.
·
, which are manually activated by crew members in distress.
·
, which are manually activated from a system's Display Console.
·
, which can be manually activated from internal and external routers.
·
, and
·
.
7.1
Man Overboard Alarms
A system-wide man overboard alarm is raised automatically if a Tag either goes out of
range of the wireless network, or if the Tag is submerged in water during an emergency.
When a man overboard is recovered and the Tag's signal reconnects to the network, the
alarm will automatically stand down and both the system and Tag default back to normal
operation.
Man Overboard Alarms
When a Tag is immersed in water it blocks the signal to the network and the following
events occur:
1. After 4 seconds it goes into a man overboard warning state and:
·
The man overboard Tag starts to vibrate.
·
The STROBE on the Tag starts to flash.
·
The Display Console LED displays fast red flashes.
·
If the Crewsafe system is connected to a GPS chart plotter, the Display
Console stores a way point for the position of the man overboard Tag at
this point.
2. After 8 seconds the system goes into a man overboard alarm state and:
·
The man overboard Tag's STROBE flashes continuously until either the
alarm is canceled, or the Tag comes back within range of the network.
·
The man overboard Tag vibrates initially for 60 seconds and then stops to
conserve battery power.
·
The STROBE on all other active Tags starts to flash and the Tags start to
vibrate.
·
The Display Console and any Internal Routers emit loud repetitive tones
and the strobe on them starts to flash.
·
The Display Console LED turns red.
·
The STROBE on all External Routers starts to flash.
·
Any external safety or alarm warning systems that are attached to a router
will also be activated when a network-wide alarm is activated (when using
factory default relay settings).