O P E R A T I O N M A N U A L
A T C - 6 0 1
APPEN D I X B
P a g e 1 5
J u n 1 / 9 7
F I E L D
S U B
F I E L D
N O . O F
B I T S
B I T S
P O S I T I O N
F O R M A T S
U P D O W N
C O N T E N T
S D
T MS
4
2 9 - 3 2
X
T a c t i c a l Me ssa g e su b f i e l d , se n t wh e n DI = 1
o r 7 , c o n t a i n s c o d i n g f o r l i n k i n g t h e C o m m -
A m e s s a g e s e g m e n t s . T h e c o d e s a r e :
0 = N o A c t i o n .
1 = U n l i n k e d , P r i o r i t y .
2 = U n l i n k e d , A c k n o w l e d g e .
3 = U n l i n k e d , P r i o r i t y , A c k n o w l e d g e .
4 = L i n k e d 1 s t S e g m e n t , S i n g l e A D S .
5 = L i n k e d 1 s t S e g m e n t , S i n g l e A D S
P r i o r i t y .
6 = L i n k e d 1 s t S e g m e n t , S i n g l e A D S
A c k n o w l e d g e .
7 = L i n k e d 1 s t S e g m e n t , S i n g l e A D S ,
P r i o r i t y , A c k n o w l e d g e .
8 = L i n k e d 1 s t S e g m e n t , M u l t i p l e A D S .
9 = L i n k e d 1 s t S e g m e n t , M u l t i p l e A D S ,
P r i o r i t y .
1 0 = L i n k e d 1 s t S e g m e n t , M u l t i p l e A D S ,
A c k n o w l e d g e .
1 1 = L i n k e d 1 s t S e g m e n t , M u l t i p l e A D S ,
P r i o r i t y , A c k n o w l e d g e .
1 2 = S e c o n d S e g m e n t .
1 3 = T h i r d S e g m e n t .
1 4 = F i n a l S e g m e n t .
1 5 = N o t A s s i g n e d .
S L
3
9 - 1 1
X
R e p o r t s t h e c u r r e n t o p e r a t i n g s e n s i t i v i t y
l e v e l o f t h e T C A S u n i t a n d i s a p a r t o f a i r -
a i r s u r v e i l l a n c e r e p l i e s , D F = 0 , 1 6 . T h e
c o d e s a r e :
0 = N o T C A S s e n s i t i v i t y l e v e l r e p o r t e d .
1 = T C A S o p e r a t e s a t s e n s i t i v i t y l e v e l 1 .
2 = T C A S o p e r a t e s a t s e n s i t i v i t y l e v e l 2 .
3 = T C A S o p e r a t e s a t s e n s i t i v i t y l e v e l 3 .
4 = T C A S o p e r a t e s a t s e n s i t i v i t y l e v e l 4 .
5 = T C A S o p e r a t e s a t s e n s i t i v i t y l e v e l 5 .
6 = T C A S o p e r a t e s a t s e n s i t i v i t y l e v e l 6 .
7 = T C A S o p e r a t e s a t s e n s i t i v i t y l e v e l 7 .
N O T E : T h e S L f i e l d h a s n o m e a n i n g f o r
a i r c r a f t w i t h R I = 0 ( n o o n - b o a r d
c a p a b i l i t y t o g e n e r a t e r e s o l u t i o n ,
a d v i s o r i e s ) .
UF
5
1 - 5
X
T h e f i r s t f i e l d i n a l l u p l i n k f o r m a t s i s t h e
t r a n s m i s s i o n d e s c r i p t o r i n a l l i n t e r r o g a t i o n s .
UM
6
1 4 - 1 9
X
C o n t a i n s t r a n s p o n d e r s t a t u s r e a d o u t s i n
r e p l i e s D F = 4 , 5 , 2 0 , 2 1 .
O ve r v i e w o f F o r m a t D e f i n i t i o n s
T a b l e 3 ( C o n t )
Summary of Contents for ATC-601-2
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