Sat 12 Apr, 2014 1:56 pm
Sat 12 Apr, 2014 2:08 pm
wayno wrote:Maker of GPS device sued in yacht race crash that left 4 sailors dead
http://www.latimes.com/local/lanow/la-m ... z2ycduAPVO
http://www.latimes.com/local/lanow/la-m ... z2xut2LhR6
Sat 12 Apr, 2014 2:15 pm
Giddy_up wrote:wayno wrote:Maker of GPS device sued in yacht race crash that left 4 sailors dead
http://www.latimes.com/local/lanow/la-m ... z2ycduAPVO
http://www.latimes.com/local/lanow/la-m ... z2xut2LhR6
I wish the family all the luck in the world in getting damages. The key letters in that media release are "LLC", which stands for Limited Liability Company. If these guys have registered their LLC in Nevada or Texas etc, but are conducting business elsewhere the family will not be able to pierce the corporate veil and reach into that company and get damages. It's a shame but it's the way the U.S system is structured.
Sat 12 Apr, 2014 2:21 pm
Sat 12 Apr, 2014 3:04 pm
photohiker wrote:Lengthy US Sailing report is here: http://offshore.ussailing.org/AssetFact ... ?vid=19623 (Page 90 shows the GEOS log)
EPIRB (SARSAT) advantages vs. SPOT/GEOS** (and other SEND’s devices)
SPOT/GEOS (and other SEND’s devices) advantages v EPIRB (SARSAT)
- EPIRBS designed to float and function in the water - SPOT not
- SAR Assets can RDF (home in on) EPRIBS signals - but not on SPOT signals
- EPIRB generally water activated (not 100% of existing EPIRB’s are water activated… some older CAT II beacons are only manual activated) - SPOT requires button to be pressed
- EPIRBS function and the SARSAT system provides location data even without GPS position - SPOT needs both GPS and messaging satellite lock to function5. EPIRB dedicated to mayday signal so battery not run down by other functions while SPOT may run down battery with tracking and messages before SOS (some SEND’s devices are required to shut down at a certain battery level to ensure the SOS function is available)
- EPIRB signal goes directly to RCC centers who control the SAR resources - SPOT adds an additional step (GEOS) adding the increased possibility of delay and human failure
- USCG RCC assumes an EPIRB signal is positive until proven false. Upon receipt of a located alert, the Coast Guard will start the process to deploy SAR assets to that known position. These assets have 30 minutes (some are much quicker to get underway than others, and many take much less than 30 min to get underway) to get underway to the position, (and for the USCG it is viewed as easier to recall the assets rather than wishing you had sent them out earlier). While the SAR asset is preparing to get underway, the SAR controller attempts to gather more information about the alert (calling emergency contact in the registration data base, perhaps having local police knock on doors if no answer at contact or checking with marina, or looking at websites/blogs or doing other detective work) If the alert is determined to be non-distress, the asset is stood down or recalled. If the received alert is un-located but registered, the Coast Guard works with the emergency contact provided in the registration database to narrow down a search area. Once a reasonable search area has been determined, rescue assets are deployed. If the distress alert is un-located and unregistered, the Coast Guard will continue to evaluate and monitor. Additional satellite passes may be needed to determine a location so that an effective search area can be developed. While SPOT/GEOS has a narrower commercial/profit mandate (to call the emergency contact, and if there is a lat/long in the SOS signal to call the SAR/USCG). GEOS will continue to monitor an SOS signal until they get location data that they can forward to the USCG/SAR.
- The EPIRB communication protocol is technically more robust and less likely to have dropped messages. You can see in the SPOT track that it regularly drops messages - they should be every 10 minutes but are not when a message gets dropped.
Disadvantages of both
- Some SPOT models (and other such devices) have some amount of 1 or 2iway messaging capability, which can provide useful information on the type of incident to the SAR assets - EPIRB has no messaging capability, only sends an alert.
- SPOT does potentially have track position data available as backup if SOS signal does not get GPS fix while EPIRB could be quickly sunk attached to vessel so fast as not to create an accurate fix and there is no prior track to the look at.
- SPOT has multi-functions, providing more day to day benefits to users.
- The use of the day-to-day functions confirms the SPOT unit works; whereas it is always a bit unknown if the EPIRB will function when turned on (the self-test function will ensure G-EPIRB’s work; following website has good background on this:
http://www.sarsat.noaa.gov/Beacon%20Tes ... olicy.html).- Many EPIRB batteries are quite expensive to replace which SPOT uses everyday batteries.
- Difficulty of contacting emergency contact at night, and lack of knowledge by emergency contact, or incorrect or no registration information
- Slow time to get fix by both units in case of fast sinking taking units with the ship (EPIRB should be mounted to float free)
Sat 12 Apr, 2014 4:24 pm
Sat 12 Apr, 2014 6:41 pm
Sat 12 Apr, 2014 7:05 pm
Strider wrote:And how you want to use it. SPOT is not a PLB replacement.
Sat 12 Apr, 2014 7:12 pm
Wed 30 Apr, 2014 8:52 pm
Wed 30 Apr, 2014 9:27 pm
photohiker wrote:The Spot Connect was logging points up until the crash, so it would appear that this accident unearthed a protocol error where GEOS did not have access to or a requirement to check the tracking points. If it had, they should have seen the device was in use and acted accordingly. GEOS is the emergency responder, not the tracking service.
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