Safety equipment - PLB?

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A little web searching will turn up many (sometimes conflicting) official SARSAT pages that describe the systems and process. There are at least two satellite constellations, one low and one high, that serve the system. And it is apparently possible to go 12 hours in some locations before you have been heard by the minimum of TWO satellites in order to get a position fix sometimes. So, PLB? Nice concept, remember that if you are in an odd corner of the world (there are coverage maps online as well) it may take 12 hours, typically 3-4, before a taxi is called.

And in the US, that process is set up so that FIRST the mission center calls up your registration data. If the beacon is registered, they will read what you wrote (i.e. that you are a diver not a boat) and they will attempt to CALL every listed number in order to screen out accidental beacons, simply because of cost.

No actual SAR response is launched until your registration has been checked, and the phone numbers called. So, a little more time before the taxi is dispatched.

You can't make any assumptions. In the US, we think of the USCG. Many folks don't realize that is not a military arm--except in time of war. Otherwise, it is an administrative agency. The USCG, and the USN, may be operating globally under signed agreements with other nations, i.e. carrying a UK official on board and operating in UK waters.

But the Australian Coast Guard, despite the Coast Guard name, is an all-volunteer watch organization, much like the UK's lifeboat service. Very different and limited resources!

The only assumption you can safely make, is that the facts will have been distorted before they were all passed around. Like Bill's surprise to find dive boats didn't carry expensive radios. Or any radios. Very different from the US, where radios are mandated, radio watches are mandated, and for something like a decade now, DSC-equipped radios have been mandated for all new sales.

PLB? I'd rather carry a small EPIRB, since the battery size and life will be at least twice as long, and that means a much better chance of being heard. Especially if there's a delay in dispatching my taxi.
 
A little web searching will turn up many (sometimes conflicting) official SARSAT pages that describe the systems and process. There are at least two satellite constellations, one low and one high, that serve the system. And it is apparently possible to go 12 hours in some locations before you have been heard by the minimum of TWO satellites in order to get a position fix sometimes. So, PLB? Nice concept, remember that if you are in an odd corner of the world (there are coverage maps online as well) it may take 12 hours, typically 3-4, before a taxi is called.

And in the US, that process is set up so that FIRST the mission center calls up your registration data. If the beacon is registered, they will read what you wrote (i.e. that you are a diver not a boat) and they will attempt to CALL every listed number in order to screen out accidental beacons, simply because of cost.

No actual SAR response is launched until your registration has been checked, and the phone numbers called. So, a little more time before the taxi is dispatched.

You can't make any assumptions. In the US, we think of the USCG. Many folks don't realize that is not a military arm--except in time of war. Otherwise, it is an administrative agency. The USCG, and the USN, may be operating globally under signed agreements with other nations, i.e. carrying a UK official on board and operating in UK waters.

But the Australian Coast Guard, despite the Coast Guard name, is an all-volunteer watch organization, much like the UK's lifeboat service. Very different and limited resources!

The only assumption you can safely make, is that the facts will have been distorted before they were all passed around. Like Bill's surprise to find dive boats didn't carry expensive radios. Or any radios. Very different from the US, where radios are mandated, radio watches are mandated, and for something like a decade now, DSC-equipped radios have been mandated for all new sales.

PLB? I'd rather carry a small EPIRB, since the battery size andlife will be at least twice as long, and that means a much better chance of being heard. Especially if there's a delay in dispatching my taxi.
Kevrumbo:
For a 2010 Wreck Expedition to the WWII Aircraft Carrier HMS Hermes off of east coast Sri Lanka, along with a PLB (satellite tracked Personal Locater Beacon),, I brought the Halcyon Diver's Life Raft and a Deep Sea Supply Hydration Pack: DeepSeaSupply - Product Detail

We did a lot of drifting deco diving, and if the dive skiff lost sight of your SMB --you were essentially adrift in the Indian Ocean, next land mass West being Somalia/Madagascar some 3000 miles away. . .
So @Rred , it's not about making naive, unrealistic or fatalistic "assumptions" -the motivation instead is to find ways to increase your margin & chances of survival in a worst case lost at sea scenario . . .even with the rescue potential of local dive-op boats, national SAR services and PLB satellite assets being delayed.

@Rred , even a dispatch delay of 12 hours worst case as above can be survivable -especially in tropical 80 deg F waters. The WWII survivors of the torpedoed USS Indianapolis just barely endured four days at sea without any acknowledged report they were overdue or Naval Command's awareness of the sinking, before being luckily spotted by a routine air patrol and later rescued. . .

●60 degree water - survival time 7 hours
●50 degree water - survival time 2.5 hours
●40 degree water - survival time 2 hours
●32 degree water - survival time 1.5 hours
-->This is why getting out of cold water is vital!
For Sale - Halcyon Life Raft - As New (see also Klymit Pack Raft). Again the life raft is a good survival tool to ward off immersion hypothermia and get you out of the water; invaluable for remote tropical dive sites with strong currents and the potential hazard of drifting away unseen on the surface from the diveboat. . .

●The less info SAR units have about your location, the larger the Search Area.
●The larger the Search Area, the longer the search until you are located.
-->The more accurately you communicate position information, and if your 406 MHz PLB registration information is complete and current (and especially preparing your designated emergency contact person with having at least phone contact info on the dive operation you're diving with), the better your chances for a speedy recovery.

Again, you prepare smartly and give yourself every objective foreseeable chance of being found.

Emergency position-indicating radiobeacon station - Wikipedia, the free encyclopedia
 
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PLB? I'd rather carry a small EPIRB, since the battery size and life will be at least twice as long, and that means a much better chance of being heard. Especially if there's a delay in dispatching my taxi.
A PLB IS a small EPIRB.

The "personal" part means that a PLB is registered to a person. An EPIRB is registered to a boat and is designed to have its mounting bracket permanently attached to said boat.

Based on the EPIRBs I have seen on LOBs, trying to dive wth one would be a challenge...

Emergency position-indicating radiobeacon station - Wikipedia
 
A PLB IS a small EPIRB.

The "personal" part means that a PLB is registered to a person. An EPIRB is registered to a boat and is designed to have its mounting bracket permanently attached to said boat.

Based on the EPIRBs I have seen on LOBs, trying to dive wth one would be a challenge...

Emergency position-indicating radiobeacon station - Wikipedia
and the following link provides the official description of the system

Cospas-Sarsat System - International COSPAS-SARSAT
 
A little web searching will turn up many (sometimes conflicting) official SARSAT pages that describe the systems and process. There are at least two satellite constellations, one low and one high, that serve the system. And it is apparently possible to go 12 hours in some locations before you have been heard by the minimum of TWO satellites in order to get a position fix sometimes. So, PLB? Nice concept, remember that if you are in an odd corner of the world (there are coverage maps online as well) it may take 12 hours, typically 3-4, before a taxi is called.

And in the US, that process is set up so that FIRST the mission center calls up your registration data. If the beacon is registered, they will read what you wrote (i.e. that you are a diver not a boat) and they will attempt to CALL every listed number in order to screen out accidental beacons, simply because of cost.

No actual SAR response is launched until your registration has been checked, and the phone numbers called. So, a little more time before the taxi is dispatched.

You can't make any assumptions. In the US, we think of the USCG. Many folks don't realize that is not a military arm--except in time of war. Otherwise, it is an administrative agency. The USCG, and the USN, may be operating globally under signed agreements with other nations, i.e. carrying a UK official on board and operating in UK waters.

But the Australian Coast Guard, despite the Coast Guard name, is an all-volunteer watch organization, much like the UK's lifeboat service. Very different and limited resources!

The only assumption you can safely make, is that the facts will have been distorted before they were all passed around. Like Bill's surprise to find dive boats didn't carry expensive radios. Or any radios. Very different from the US, where radios are mandated, radio watches are mandated, and for something like a decade now, DSC-equipped radios have been mandated for all new sales.

PLB? I'd rather carry a small EPIRB, since the battery size and life will be at least twice as long, and that means a much better chance of being heard. Especially if there's a delay in dispatching my taxi.

and the following link provides the official description of the system

Cospas-Sarsat System - International COSPAS-SARSAT
With regard to COSPAS/SARSAT, again the following is a short sample list of documented rescues from just this year so far::
Yacht abandoned in severe storm recovered after drifting hundreds of nautical miles
2017-03-14 14 hours to reach circumnavigating yacht trapped in rough seas near Sydney for 100 hours - International COSPAS-SARSAT
2017-03-20 COTS divers rescue fishermen in distress in Great Barrier Reef - International COSPAS-SARSAT
2017-03-07 Former lifeguard out fishing rescued from Port Fairy sea, Australia - International COSPAS-SARSAT
2017-03-21 AMSA and Navy aid South African nationals with broken mast in remote Southern Indian Ocean - International COSPAS-SARSAT
2017-02-16 Alaskan snowmobile trip to hot springs cut short - International COSPAS-SARSAT
2017-04-10 When a plane crashes on a mountain side and no one is around can you hear it? YES! - International COSPAS-SARSAT
 
image.jpeg
AF1QipOY7Td1iVpoZLvPzA0CkLo3ghINObSnw3lar6su

McMurdo Fastfind Plus PLB in Gold Dive Canister (on Right Hip), 51m deep on the WWII Aircraft Carrier HMS Hermes sunk-in-action, off east coast Sri Lanka, Indian Ocean.
 
Cool. What's the yellow things on your waist?
Yellow AL50 O2 deco cylinder (with the 2nd stage coming loose & hanging), nose clipped to hip D-ring.
 
image.jpeg

Sidemount in Palau, Gold PLB Dive Canister on Right Hip; Halcyon Diver's Life Raft in pouch clipped onto Butt D-ring and attached with shock cord to sidemount harness.
 

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