If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
Announcement
Collapse
No announcement yet.
Malaysia Airlines Loses Contact With 777 en Route to Beijing
keeps going in a straight line (VNAV, HDG/TRK HOLD) until the fuel runs out. There should also be an EICAS message indicating that no active route is selected.
However, this is not what happened with Helios, which started and kept a holding pattern IIRC..
--- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
--- Defend what you say with arguments, not by imposing your credentials ---
However, this is not what happened with Helios, which started and kept a holding pattern IIRC..
Yes, but that flight did not reach a last waypoint, it was flying the selected flight plan in lateral guidance and when it overflew Athens at cruise altitude it automatically executed a missed approach procedure into a holding pattern.
However, this is not what happened with Helios, which started and kept a holding pattern IIRC..
this is interesting...i dont know much about the helios522 flight and am reading about it now....is this a normal thing that a flight will enter a holding pattern when it gets to a waypoint on AP....is this kind of a back up thing??
Do they have to "steam" out there? Couldn't a reconnaisance plane take some high definition spy photos and beam them to land first? Another thing I always wonder is the nuclear subs that patrol all the oceans of the world. Could one of them be fairly close?
(...)Another thing I always wonder is the nuclear subs that patrol all the oceans of the world. Could one of them be fairly close?
I'd say the density of (nuclear) subs in that part the Indian Ocean is probably quite low. And even if one was close, they would most likely stay where they are and not disclose their location.
Originally Posted by sjwk View Post
Some more questions:
If flying on autopilot and you reach the last waypoint, does the autopilot:
disengage,
fly in a pattern around the final waypoint, or
keep going in a straight line?
The answers from the others are all correct in different scenarios.
It depends on what has been loaded in the FMC. If just the basic route has been loaded, with no arrival, then the aircraft will continue on the last track.
If the arrival/approach has been loaded, then it will do the same on the missed approach track, unless the last waypoint of the missed approach incorporates a holding pattern.
Does this mean there is perhaps an argument to ensure that all missed approaches should end in holding points over unpopulated areas? Interesting yet unrelated thought.
eTang, you want a motive besides diamond stealing?
Well: Diamonds would have been an easy to transport after robbery item (small, very valuable, could be changed in form to make them unrecognisable ... great value-to-size and value-to-weight ratio. Therefore this consideration.
Well one motive that I hope isn't the case but is plausible in this case is pursuit of political agenda. Sacrificing innocent civilians for such a cause is part of the agenda - ie 9-11 in which I saw the 2nd plane hit and lost people I know.
News reports on the pilot state he is related to the opposition leader to the Malaysian Government, and was in court watching his friend get sentenced to 5 years in jail the same day of the flight. There are pictures of the pilot wearing a "No Democracy" t-shirt. So he wants to humiliate and bring the spotlight on the Malaysian Government. So the pilot makes his statement by taking this airplane and trying to make it disappear by flying to the deepest and remote region of the Indian Ocean hoping the plane would never be found. Not for insurance purposes but political agenda. And the spotlight has, in fact, now been on the Government since this incident began.
I was not aware of that "was in court that day" news ... that would indeed be a strong motif to act spontaneously to an acute emphasised emotion. Tough!
On Slashdot in discussion on how to best find this plane and if Navy can use what was used to locate sunken submarine someone made the following statement:
~quote~
"Maximum range at maximum load for the 777-200ER is 7,725 nmi (14,310 km, 8,892 mi), a whole lot more than the 2500 nmi circles the media is drawing on the screens."
~end quote~
Is that true?
This person also suggested that it cannot be ruled out yet that plane was refueled.
What do you think?
I've worked on buoys that are released automatically at certain depths for location purposes. I've never heard of their use on commercial aircraft.
Thank you Highkeas for your response. Maybe now this kind of device will be deployed in commercial aircrafts.
In that Slashdot discussion someone said that "the Scorpion was found because the U.S. had an extensive underwater listening array in the Atlantic (SOSUS) designed specifically to (wait for it...) locate and track submarines.".
He goes on suggesting this kind of array may have picked up a sound of the plane impact with the ocean and describing challenges with finding that data (no specific time and location) and sharing it (without compromising the source).
The answers from the others are all correct in different scenarios.
It depends on what has been loaded in the FMC. If just the basic route has been loaded, with no arrival, then the aircraft will continue on the last track.
If the arrival/approach has been loaded, then it will do the same on the missed approach track, unless the last waypoint of the missed approach incorporates a holding pattern.
Does this mean there is perhaps an argument to ensure that all missed approaches should end in holding points over unpopulated areas? Interesting yet unrelated thought.
MCM, I think what he's getting at is if the rogue pilot enters a string of new waypoints without an arrival, what happens at the end of the last leg of that string?
Saw interesting interview that brought up two points:
1. Satellite images we are seeing from US firm and by US Law the satellite images released to public cannot be the high resolution ones, so authorities have better images than what we are seeing thus their "high credibility" quotes on the pictures.
Missing Malaysia Airlines plane: US satellite the unspoken source that sparked search for MH370
Originally posted by SydneyMorningHerald
When the Australian official took the podium to explain to reporters the discovery of satellite images that might show pieces of MH370, he carefully omitted to tell them the source.
The images were from a US satellite. The Australian Maritime Safety Authority's John Young didn't mention this to the media. Nor was he asked. But he wouldn't have disclosed it in any case.
When the Australian official took the podium to explain to reporters the discovery of satellite images that might show pieces of MH370, he carefully omitted to tell them the source.
More information about the Satellite that may be the one which provided the images: WorldView-2
The satellite that may have found missing Malaysia Airlines Flight MH370
Originally posted by SydneyMorningHerald
Launched on October 8, 2009, and owned by US satellite company DigitalGlobe, WorldView-2 provides imagery at a resolution of approximately 50 cm. It takes a new image of any place on earth every 1.1 days (1 day , 2 hours and 24 minutes).
The satellite, among many others that DigitalGlobe owns, weighs 2800 kilograms, operates at an altitude of 770 kilometres, and is able to collect nearly 1 million square kilometres of imagery every single day, which is then distributed to those who pay for access to DigitalGlobe's imagery.
50 cm resolution ... 'they' should know much more than they tell us!
wow!
Maybe. On the other hand, one of the parts was reported as measuring 5m. That would be just 10 pixels. Something like this: i
--- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
--- Defend what you say with arguments, not by imposing your credentials ---
With so many ship being sent, does it indicate a confident lead on the government's sides?
It is clear that they have learned form the last few weeks on speculative leads. Let us hope that the number of ships they send is an indication of something credible.
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
Tweet
Comment