What is EPIRB? How does it activate? What is HRU? How does it operate?
-An EPIRB is a compact, buoyant, self-contained radio transmitter.
-As per SOLAS min 1 no to be carried and as per D.G shipping requirement on INDIAN vessel min 2
no to be carried.
-Battery storage life 5 year and weight 2 kg
-It is located on the bridge wing attached with H.R.U.
-Capable of floating free and is automatically activated in the event of the ship sinking.
-Activated, it continuously emits a distinctive radio signal for a minimum of 48 hours.
-An Emergency Position Indicating Radio Beacon is used to alert search and rescue services in the
event of an emergency.
-it does this by transmitting a coded message on the 406.5 MHz distress frequency via satellite and
earth stations to the nearest rescue co-ordination centre
-Some EPIRBs also have built-in GPS which enables the rescue services to accurately locate you to +/- 50 metres.
-406 MHz EPIRBs work with the Cospas-Sarsat polar orbiting satellite system, giving true global coverage. There is an alert delay of about 45 minutes dependant on when the satellites come into
view on the horizon
-The satellite can determine the position of your EPIRB to within 5km (3 miles). The coded message identifies the exact vessel to which the EPIRB is registered. This information allows the rescue services to eliminate false alerts and launch an appropriate rescue.
-GPS-enabled EPIRBs have a built-in transmitter which will typically alert the rescue services within 3 minutes and to a positional accuracy of +/- 50 metres (updated every 20 minutes) given a clear view skywards.
-Some EPIRBs also have a secondary distress transmitter. This transmits on 121.5 MHz and is used for "homing" purposes. When the rescue services get close, this allows them to direction find on the signal. Some EPIRBs also have a high brightness LED flashing light that aids final visual location.
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