Urgency

A condition of being concerned about safety and of requiring timely but not immediate assistance; a potential distress condition.

Source: Pilot Contoller Glossary (PCG)

See also:

#
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z