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Mode S features[edit]
Upon interrogation, Mode S transponders transmit information about the aircraft to the SSR system, to TCAS receivers on board aircraft and to the ADS-B SSR system. This information includes the call sign of the aircraft and/or the transponder's permanent ICAO 24-bit address in the form of a hex code.
ICAO 24-bit address[edit]
Mode S equipment on aircraft are assigned a unique ICAO 24-bit address or (informally) Mode-S "hex code" upon national registration and this address becomes a part of the aircraft's Certificate of Registration. Normally, the address is never changed, however, the transponders are reprogrammable and, occasionally, are moved from one aircraft to another (presumably for operational or cost purposes), either by maintenance or by changing the appropriate entry in the aircraft's Flight management system.
There are 16,777,214 (224-2) unique ICAO 24-bit addresses (hex codes) available.[3][4] The ICAO 24-bit address can be represented in three digital formats: hexadecimal, octal, and binary. These addresses are used to provide a unique identity normally allocated to an individual aircraft or registration.
Example of an ICAO 24-bit address:
Hexadecimal: AC82EC
Decimal: 11305708
Octal: 53101354
Binary: 101011001000001011101100 (Note: occasionally, spaces are added for visual clarity, thus 1010 1100 1000 0010 1110 1100)
(These all correlate to the same aircraft registration, N905NA).[5][6]
Issues with Mode S transponders[edit]
One major issue with Mode S transponders is that pilots have frequently been entering the wrong flight identity into their Mode S transponders.[7] In this case, the capabilities of ACAS II and Mode S SSR can be degraded.[8]
The provision of air traffic services (ATS) using SSR Mode S, initially in a central area of European airspace, will rely on a unique ICAO 24-bit aircraft address for selective interrogation of individual aircraft. The 24-bit aircraft address is also an essential element of the airborne collision and avoidance system, ACAS II.
The 24-bit address will also be used in ELTs and in SATCOM. It is 'hardwired' into your aircraft transponder and ELT and will stay with your aircraft whilst on the Netherlands register.
Link
auroraaus0
reply to post by liteonit6969
I read something earlier about the cargo load (according to the airline ceo....take it with a grain of salt) and had a bit of a "Aurora needs more coffee" moment.
No hazardous cargo - just mangosteens
Malaysia Airlines (MAS) flight MH370 was transporting 3-4 tonnes of mangosteens to China, said the airline's group chief executive officer Ahmad Jauhari Yahya (pic) today.
Speaking at the latest press conference on the missing MAS flight MH370, Ahmad Jauhari added that there was no hazardous cargo on board the aircraft.
No hazardous cargo - just mangosteens
Malaysia Airlines (MAS) flight MH370 was transporting 3-4 tonnes of mangosteens to China, said the airline's group chief executive officer Ahmad Jauhari Yahya (pic) today.
Speaking at the latest press conference on the missing MAS flight MH370, Ahmad Jauhari added that there was no hazardous cargo on board the aircraft.
qmantoo
auroraaus0
reply to post by liteonit6969
I read something earlier about the cargo load (according to the airline ceo....take it with a grain of salt) and had a bit of a "Aurora needs more coffee" moment.
No hazardous cargo - just mangosteens
Malaysia Airlines (MAS) flight MH370 was transporting 3-4 tonnes of mangosteens to China, said the airline's group chief executive officer Ahmad Jauhari Yahya (pic) today.
Speaking at the latest press conference on the missing MAS flight MH370, Ahmad Jauhari added that there was no hazardous cargo on board the aircraft.
Mangosteens were released in a news confeerence by the CEO of Malaysian Airways. You cannot get much more 'official' than that.
Regulations for Commercial Transportation
Hazardous materials (a.k.a dangerous goods) sent using commercial transportation must comply with Hazardous Materials Regulations, 49 CFR Parts 171-179. These regulations apply to those who offer, accept, or carry hazardous materials to, from, within, and across the United States.
FAA
Biigs
reply to post by tothetenthpower
Its hard not to "get the feeling" its all going to kick off big time, soon.
I dont think of my self of a doomsayer for WIII tinfoil helmet, but the sheer amount of aggression being shown around the world in the past year, its getting crazy.
RP2SticksOfDynamite
Now 275 pages.
All this speculation only deflects from the obvious.
This plane was Hijacked and mostly likely by ME's....
I am not saying i speculate. I am saying that it is common sense that this is what happened (It was a H and I am saying this is a fact.) Crash or Landing!!! No speculation there. I do offer 2 outcomes though and I am not sure which is reality but one sure enough is.
JRCrowley
RP2SticksOfDynamite
Now 275 pages.
All this speculation only deflects from the obvious.
This plane was Hijacked and mostly likely by ME's....
First you say "all this speculation" then you say "This plane was Hijacked"...
Are you aware of the fact that it is speculative to say that it was hijacked?