Mark,
As usual, you have hit upon a VERY important issue....but one that is unfortunately misunderstood by many...
(I hope you don't mind my adding to the discussion, and providing some real-world clarity?)
Quote:
Originally Posted by MarkJ
Other interesting thing is modern EPIRBS. Is it better to buy an extra EPIRB with the savings on a smaller raft? How many people, recently, have had a long time floating in rafts? Before epirbs there was quite a few.
|
Quote:
Originally Posted by MarkJ
Yep. I think doing everything to ensure a rapid pick-up is important.
Multiple epirbs going off must make it obvious to SAR that the emergency is genuine.
Life in a raft without an epieb would be quite droll. Chances of being picked up very remote.
|
Yes, should an emergency occur and you need rescue (the only reason you'd set-off an EPIRB), getting your emergency call heard by everyone, especially the RCC's and vessels near you, is of course what we all hope to accomplish!!
EPIRB Activation? What happens/How to improve rescue odds
And, here is where things take time!!
It is not like dialing 911 (or 999) on a
cell phone, on shore....and calling the RCC's directly on a sat
phone doesn't do anything to speed up the process much, either....
Please read this thread, and especially links to COSPAS-SARAT and Beth Leonard's articles!!
You will learn a LOT, and many will be surprised at how long it can take (even in the best scenario) before anyone near you is notified of your emergency and someone is tasked to come to your assistance!
And, this why the second "S" in the GMDSS stands for "System"...'cause it is a "system"....and we pleasure boat sailors should be aware that the more
parts of the "system" that we can use, the better off we are!!
Which is why I advocate using MF/HF-DSC as your additional Distress signaling device, as this does notify the RCC's as well as notifying all other vessels in range!!! (and, not to mention that you can also use MF/HF-DSC to signal other vessels, coast stations, etc. for NON-DISTRESS situations, which you cannot do with an EPIRB, and you cannot use a sat
phone to call other vessels, nor random coast stations, 'cause you don't know their phone number, nor who/where any other vessels are!!)
EPIRB Activation? What happens/How to improve rescue odds
Of course, once we are beyond the USCG and Canadian Coast Guard helo range (~ 200 miles off the US Coasts), and beyond the coastal waters (> 20 miles) of many 1st world nations (UK, EU, AUS, NZ, etc.), any rescue is going to come from merchant vessels in your vicinity (or in some rare cases, int'l naval forces)....
And, here is where things take more time!!
And, while setting off 2 EPIRB's (or an EPIRB and PLB) at the same time is fine (and understood by the professionals at the RCC's to mean there is
really an emergency), and if you do have 2 EPIRB's (or an EPIRB and PLB), setting them both off at the same time (or within minutes of each other) IS the proper way to use them (and leave them BOTH on, and transmitting, until safely on-board your rescue vessel or instructed to turn them off by the RCC!!)
BUT..
But, understand that this doesn't do anything to alert other vessels in your vicinity....remember that a container ship traveling at 24 kts can cover about 600nm in one 24 day...
So, using BOTH MF/HF-DSC
Distress calling AND VHF-DSC Distress calling, is what is needed to alert other vessels within a few hours, or a day's, sail from your location, and using
DSC (MF/HF-DSC) will also alert the RCC's that there is a vessel in distress....
Remember, there are > 80 HF-DSC coast stations, and > 450 MF-DSC coast stations, worldwide, listening for
DSC Distress calls and tied directly to their RCC's...
As well as 1000's of SOLAS-grade vessels plying the world oceans 365 days a year....and if you're sailing in/thru the common cruising areas / routes, you are probably within a day's sail of dozens of them...
EPIRB Activation? What happens/How to improve rescue odds
In general...
If you do things right, make both VHF-DSC and MF/HF-DSC distress calls, along with a properly registered EPIRB activation (and if equipped, an INMARSAT-C GMDSS distress alert):
a) If you are in coastal waters, chances are you'll not spend much time in a liferaft...(less than a day?)
b) If you are within helo rescue range, etc., then expect to spend a day or less in a raft...
c) If well offshore, but still within a few hundred miles (</= 500 miles) of merchant
shipping, expect to spend 1 to 2 days in the raft...
d) If in far remote areas, where you are > 500-1000 miles from merchant
shipping, and where naval forces will likely be used, expect to spend a few days in the raft...
Now, if you don't do things right, don't have MF/HF-DSC, and/or don't get your EPIRB deployed correctly (please read the linked thread), you're going to be in a raft for a while...
EPIRB Activation? What happens/How to improve rescue odds
BTW, if you wish to see where the merchant shipping is, and compare their common routes to your planned sailing/cruising, have a look at this video...
And, in addition to the above thread on EPIRB's, for lots of info regarding Distress signaling, HF-DSC comms, etc., please take the time to watch these videos as well...
https://www.youtube.com/playlist?lis...ga2zYuPozhUXZX
I hope this helps...
fair winds to all..
John