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|  MIL-N-85005A(AS)
1 FEBRUARY 1977
(5) Omega Navigation Test Conditions
Rate aiding information will be derived from
(a)
the inertial system.
Automatic station selection shall be used.
(b)
Any Omega transmitter operating normally may
(c)
be used during the test period. Normal opera-
tion shall be defined as a station that is
transmitting, synchronized, and radiating a
nominal 10 kw of power.
Phaselock loop settling time is a function of
(d)
signal to noise ratio. Therefore, adequate
flight time will be allowed before measure-
ments are made to allow all phaselock loops
to achieve steady state under existing signal
to noise ratio conditions.
*
3.4.2.2
NAV/ASW System Accuracy
The accuracy of NAV/ASW System shall be as follows when the
conditions are in accordance with 3.4.2.1:
(1) GEONAV Mode
(a)
IN Navigation: 1.5 nm/hr Circular Error
Probable (CEP) for not greater than 10 hours
and 2.75 nm/hr 90th percentile position error
for not greater than 10 hours.
(b) DI Navigation: 0.5 NM 1.64% of distance
traveled CEP when compensated for surface
movement and system drift.
DA Navigation:
3.5 NM per hour CEP.
(c)
(d) Omega Navigation: The radial position errors
shall not exceed 2.0 nm (RMS).
(2) TACNAV Mode
(a) DA Navigation: 25 yards per minute averaged
for no less than 30 min.
(b) AI Navigation: 35 yards per minute averaged
for no less than 30 min.
(c) AA Navigation: 40 yards per minute averaged
for no less than 30 min.
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