Overall, nothing beats the simplicity of hanging a marine VHF on a crew neck and diver carry one too ( IPX7 rated ) in a dive cannister. This is the fastest response, and you can confirm transmission reception.
This is absolutely not true! Why are you pushing a "rescue system" that at best would be of limited range use on a very well organized/funded dive boat such as a top class liveaboard. Even then the range of these UHF or VHF systems is basically line of sight...10 km or so. Such a "device" would most likely not help these divers in the slightest.
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I think you did not follow from the start for the safety gear reccomendation I speak of.
Look at Natasha post.
http://www.scubaboard.com/forums/ac...ng-off-sangalaki-post7481418.html#post7481418
The older link, but page 19, post 181.
http://www.scubaboard.com/forums/ac...ndonesian-island-post7044201.html#post7044201
For Indonesian waters, best to have, and in order of importance and speedy pick up if not rescue:
01. Hanging a marine VHF on a crew neck and diver carry one too ( IPX7 rated ) in a dive cannister. This is the fastest response. No need DSC capable. Simple IPX7 or IPX8 rated marine VHF.
02. PLB
The AIS-SART I speak of is for those in 1st world country to have a back-up device for local use.
Or if you dive in groups among your own friends in remote area 3rd world countries and wanted to have a dedicated local rescue system before activating a PLB. The AIS-SART and say a six person sharing a DIY receiver display system I wrote about is not too expensive and the team will have something similar to ENOS. Since AIS-SART transmission is text message, it will go further than voice. Since a chartplotter is part of the system, the boat will find the diver easier.
Prior to PLB, in 1997 I and my dive team installed a Sitex RDF ( radio direction finder ) on my friend's boat, which so happen the boat is the primary dive boat for us. Its for extended range where if divers can't see the dive boat, the RDF will be used, but fortunately in its entire 9 years of life when the boat was sold, the RDF was never used. Voice over IPX7 marine VHF in the dive cannister is enough as the drift was never beyond 2KM and the dive boat is big enough to be seen. Came 2009 and McMurdo PLB FastFind was small enough to carry in a dive cannister and that was an added safety device. I immediately got a McMurdo Fast Find PLB in 2009 and its nylon cannister from Custom Diver in UK. Now I have Ocean Signal PLB1 smaller units, not one but 2. My McMurdo 5 year battery shelf life expires early 2015. Ocean Signal PLB1 has 7 years battery shelf life.
Again, I have to emphasize, if you want to carry ONLY 1 long range recall device for Indonesian waters, nothing beats
hanging a marine VHF on a crew neck and diver carry one too ( IPX7 rated ) in a dive cannister. This is the fastest response.
This has saved me a few times and also my friends from becoming part of the lost divers statistic.
The key is to avoid national SAR team of the country you dive in, to be involved or mobilized.
Drifting at sea for 12-24 hours or more and overnight is not something for the faint hearted and it is a selfish act.
The moment you drifted too far and you have to trigger a PLB distress transmission , your whole dive boat and dive members need to stop diving and look for you, because when they can't find you +30 to 60 minutes after everyone already surfaced and collected, they on the boat will declare an emergency.
Relying on a 3rd world country ( meaning poor country ) already limited SAR assets is not a good thing and overall from the moment you trigger a PLB distress signal, to the actual SAR mobilization , depending on where you are in Indonesia, it takes time. PLB typically has only 24 hours transmission when activated. Yes, it can register your drift direction for those 24 hours transmission, ...again until one has experienced drifting at sea more than 24 hours, avoid this kind of experience at all cost.
Indonesia is not USA or any 1st world country with well funded and well equipt SAR team.
Most diving locations, except Bali, is considered remote area. Indo SAR ( Basarnas ) team or assets are located in major cities, as they also assist flood victims, volcano eruption, missing people in the mountain , aviation accidents and so on. They are not like USA Coast Guard which specifically guard US waters from intruders , smugglers and ALSO task to save boaters/divers/person life and even animals.
Indo equivalent of US Coast Guard does not yet exist
The dilemma of Indonesia
The equivalent of Indo Cost Guard are now the Indo Marine Police and the Navy and they are more into guarding our territorial waters, not for rescue mission.
Indo SAR ( Basarnas ) is the one handling all EPIRB/ELT/PLB distress signal at Jakarta Airport and the one supposedly cordinating rescue effort when receiving such distress signal. They can request assistance to the Marine Police of the Navy or Military if the distress location is not within their SAR asset.
In Sanglaki case, the Indonesian Military send out their chopper to help.
Helikopter TNI AD Ikut Bantu Cari 4 WNA Penyelam yang Hilang di Sangalaki - Kompas.com Regional
Pencarian tidak cuma di laut tetapi juga melalui udara dengan memanfaatkan helikopter jenis Bell milik TNI AD.
........
Gabungan SAR didukung kapal rescue boat 215 Basarnas, rigid infetable boat SAR Tarakan, tug boat PT Berau Coal, hingga belasan speedboat milik warga.
The above means :
- Chopper from the military. TNI AD means Land Force, military.
- Basarnas rescue boat #215
- Tarakan city inflatable rescue boat
- Berau Coal company tug boat.
- Many local owned speed boats.
BASARNAS asset in Kalimantan - Balikpapan.
Rescue Boat 215 Tambah Kekuatan Basarnas Balikpapan - Tribun Kaltim
Balikpapan is 260ish nautical miles to Sanglaki.
Basarnas rescue boat #215 is a 36 meters and the cruising speed will be at best 20 knots and it will be a semi displacement
hull meaning speed is not a priority but range is, for it to be able to do decent 500+ n.miles range endurance.
The faster #215 go, they more fuel they burn.
This #215 rescue boat will need 13 hours to reach Sanglaki at 20 knots and would burn at least 7,000 liters of diesel just to arrive at Sanglaki at 20knots speed.
If Basarnas did not deploy their chopper for Sanglaki, that means Balikpapan does not have a dedicated Basarnas SAR chopper yet.
http://nasional.news.viva.co.id/news/read/635775-tambah-kekuatan--basarnas-akan-beli-24-helikopter
The story from June 2015 wrote :
- Currently Basarnas owned 8 chopper from the 1980s
- Want to buy 24 more this 2015 budget year.
8 chopper only for Indonesia which is 3,600 ish miles east to west , means the assets are spread real thin.
Balikpapan is not a major city in the Indonesian cities hierarchy, even though the entire Kalimantan ( Borneo ) is a real money machine for coal, at least for the last many years....but not today in 2015.
Therefore, I will repeat again and again......
Nothing beats the simplicity ( and SPEED of self rescue from the dive boat ) of hanging a marine VHF on a crew neck and diver carry one too ( IPX7 rated ) in a dive cannister.
Yes, please do carry a PLB too as last resort. Carry two, not one so that you get 48 hours transmission.
BTW, a diver trigerring a PLB in Indonesia is not yet documented as to how fast the actual response is for the actual X dive area. There was a case of accidental triggering in 2010 by a friend, due to cannister leak and the McMurdo Fast Find PLB triggered a transmission in a storage room of a dive center. The leak occured from a previous dive. The antena was not even deployed ( rolled out ) and the dive center storage room has those red tiles simple roof, not concrete roof. Such transmission power the PLB has. That PLB was registered in USA NOAA, so the USA Coast Guard or Navy called my friend cell phone to re-confirm if that was a false alarm or not. Case closed.
Dive safe....