- actually, I think it quite a large club. You are obviously content. As I said, I 'accept' very little except LKP.
- probably because if it is at the bottom of the South Indian Ocean it becomes slightly less relevant, does it not?

The flight time from airbase to the search area is approximately 4 hours, not 2. The search planes are scheduled for take off at staggered times so as to keep at least one plane in the search area all or most of the daylight hours.

If this was another Sully controlled landing in calm seas, the aircraft wouldn't be floating two weeks later.


If a fuel exhausted aircraft impacted the water from altitude then you just wouldn't have 22 metre pieces of debris still floating. Three metres at a push but not twenty two.

BOAC how did it get to the bottom of the southern ocean without crossing the peninsular.

the discussion about whether it was 370 crossing the peninsula stopped before the efforts to identify where on either arc it might be started.

You dip in every couple of days BUT don't read the interim posts, you admitted you only looked back 5 posts for something the other day.

if you don't read them all you won't be up to date.

Oh disbelieving everything that doesn't suit your view is pointless.

If you are using mk1 eyeballs to look for the debris, you don't want to be starting at dawn when there will be long shadows.

Collectively the ping arcs provide the "possible" track
 

Each time the ping occurred it defined a possible arc (i.e. the aircraft is somewhere on that arc? Right we've all got that?

The next ping will give us another arc, the difference between arcs reflects the distance traveled. The aircraft has a minimum and maximum speed that allows the plane to move to the next arc. However the overall distance traveled to the last ping tells us the average speed, and I think we all agree it's unlikely to have done much other than cruise at this average speed...

So, collectively each arc and the next give us a track, right? If the arc doesn't change from one ping to the next the aircraft was either traveling along that arc or intersected it again, or was stationary. The over distance traveled/time will reveal whether the idea the aircraft was stationary at any time seems plausible - personally I doubt it. :hmm:

Can anyone tell what is wrong with the above?

AndyJS
The final handshake/ping data had to be released to convince everyone that the aeroplane was far South (or North) and definitely not in the South China Sea. After that there was no benefit to the investigators in releasing extra information, it would just lead to more spam in the e-mail accounts of NTSB, Boeing, Inmarsat, the Malaysian Authorities etc. etc.

I do and it hasn't.

Nope, because you don't know what point the plane was on for any of the arc.

All you can tell by consecutive arcs is what component of the track was toward or away from the satellite.

If you know the speed, then using simple geometry, you can then calculate the other component, and that will then give you a position relative to the previous ping.

I assume this is how the NTSB decided on the location in the southern ocean.

- I invite you to 'look back'? I believe I said 5 pages. - please explain that assumption. Why could it not be ANYWHERE on the arcs? What specific information would be available to position the ping at the extremes?

A further puzzle - the Inmarsat man said that during the 7 hours the 'pings got longer', yet they started around the 40 and finished around the 40. Huh?

Missing jet WAS carrying highly flammable lithium batteries: CEO of Malaysian Airlines finally admits to dangerous cargo four days after DENYING it
MH370 WAS carrying highly flammable lithium batteries admits CEO of Malaysian Airlines | Mail Online

How does this affect the thinking on the ‘cause’ of this aircraft being missing?

GarageYears True. The arc we see is derived from the final ping and is not the track, on it somewhere is one point of the track.

....and TOPKIN, NISOK, SELSU and KETIV gets you 1,200NM from Perth.
After 7hr 30mins.

Straight along the line (after the turn around the top of Indonesia)

What I am suggesting is that YWKS was put into the FMS as a destination or waypoint.

BOAC

My interpretation is that NTSB will be modelling the track of the aeroplane and comparing it to the ping data, as I have described previously. On the assumption that a constant heading (or a great circle) course at constant (or near constant) speed was maintained the ping data will rule out all but a small range of possible courses. We must presume that on those assumptions NTSB believe the track West of Australia is the post probable course. Of course, a complex course with changing headings and speeds could emulate the ping data, but given the search time available NTSB will have gone for the simplest solution.

I don't think we can parse the verbal statements of various officials to get closer to the unreleased ping data.

Lithium ion batteries are not highly flammable. However, they can 'run away' and once started they produce their own fuel as the electrical energy discharges through an internal short. OK - so what happens if some cargo catches fire in the hold? Fire warning from the hold sensors to the cockpit and transmitted on ACARS. Crew immediately declare an emergency on their current frequency and squawk emergency.

Can anyone who knows the layout of the 772 give a way that the fire from batteries as cargo in the hold would selectively disable the ACARS, SSR, ADS and VHF/HF but not disable the power to the low gain SATCOM all the way back near the tail? Then that severe fire would extinguish itself and allow the FMS HDG to operate faultlessly and the aircraft to fly for the next 7 hours. This does not seem logical the fire is so severe that it immediately disables a whole raft of duplicated systems but not severe enough to disable all systems or to cause the aircraft to crash.

A great circle is not, in general, a line of constant heading.

First Light
 

Yes I believe most modern aircraft can fly in the dark but can you effectively conduct a visual search in the dark?
When is first light? Well there is civil twilight, nautical twilight and astronomical twilight, take your pick.
Today's time for Perth are
Astronomical twilight 5.00 a.m. local (GMT +8)
Nautical twilight 5.29 a.m.
Civil twilight 5.57 a.m.
Sunrise 6.21 a.m.
Now the search zone is at least 20 degrees West of Perth so Sunrise will 80 minutes later, however the search area is also further South than Perth and being Autumn in the Southern Hemisphere Sunrise will be even later.
So an aircraft leaving Perth at 5.00 a.m will be in the search area shortly after Dawn.

Still does not explain not giving out a distress call!!!!

navman
Quite so, I was expressing two options that might be modelled. On the line from Malaysia to West of Australia the great circle and constant heading courses to any particular point deviate by about 30km.