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SVTPerformance's Chain of Restaurants
Road Side Pub
Total bridge collapse in Baltimore...
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<blockquote data-quote="RES0574" data-source="post: 17027940" data-attributes="member: 176936"><p>This vessel is classed with NK (<a href="https://www.classnk.com/hp/en/index.html" target="_blank">ClassNK</a>), which I have not been impressed with in the past. They are not as thorough or stringent with the Rules applications that I experience with ABS, LR, and DNV. </p><p></p><p>This situation with the VDR is abnormal. The VDR and contributing systems that provide the information to the VDR such as the propulsion controls, steering controls, bridge control systems, comms, and nav systems (GPS, anemometer/windbird), are backed up by UPS systems.</p><p></p><p>The audio hub for the VDR, that records from the various microphones positioned on the bridge and the VHF radios, is powered from the VDR, which is redundantly supported by the previously mentioned UPS. Current technology has evolved to CAT6 PoE, so that gives you an idea of how little power is required for these microphones. The UPS' of these systems for comparison are the size of small transformers, so they have plenty of run time (Ah), and support voltages up to 230VAC/60Hz.</p><p></p><p>Current vessels also have a Free Float Capsule that records the previous 48 hours of voyage data from a sinking incident. This capsule is released/free floats when the vessel sinks with a combination EPIRB so that it can be located. Based upon the age of the vessel, it should have one. NTSB should be taking data from BOTH the VDR AND the Free Float Capsule because they would be recording the same information.</p></blockquote><p></p>
[QUOTE="RES0574, post: 17027940, member: 176936"] This vessel is classed with NK ([URL="https://www.classnk.com/hp/en/index.html"]ClassNK[/URL]), which I have not been impressed with in the past. They are not as thorough or stringent with the Rules applications that I experience with ABS, LR, and DNV. This situation with the VDR is abnormal. The VDR and contributing systems that provide the information to the VDR such as the propulsion controls, steering controls, bridge control systems, comms, and nav systems (GPS, anemometer/windbird), are backed up by UPS systems. The audio hub for the VDR, that records from the various microphones positioned on the bridge and the VHF radios, is powered from the VDR, which is redundantly supported by the previously mentioned UPS. Current technology has evolved to CAT6 PoE, so that gives you an idea of how little power is required for these microphones. The UPS' of these systems for comparison are the size of small transformers, so they have plenty of run time (Ah), and support voltages up to 230VAC/60Hz. Current vessels also have a Free Float Capsule that records the previous 48 hours of voyage data from a sinking incident. This capsule is released/free floats when the vessel sinks with a combination EPIRB so that it can be located. Based upon the age of the vessel, it should have one. NTSB should be taking data from BOTH the VDR AND the Free Float Capsule because they would be recording the same information. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Road Side Pub
Total bridge collapse in Baltimore...
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