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Minimum Aviation System Performance Standards for Aircraft ...

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86<br />

© 20xx, RTCA, Inc.<br />

a. The ADS-B Transmitting Subsystem shall (242AR3.147-B) accept in<strong>for</strong>mation from<br />

an appropriate interface that indicates whether or not the Altitude Hold Mode is<br />

active.<br />

b. The ADS-B Transmitting Subsystem shall (242AR3.147-C) set the Mode Indicator:<br />

Altitude Hold Mode field in accordance with Table 3.2.28.<br />

Table 3.2.28: “Mode Indicator: Altitude Hold Mode” Field Values<br />

Values Meaning<br />

0 Altitude Hold Mode is NOT Active or Unknown<br />

1 Altitude Hold Mode is Active<br />

3.2.29 Mode Indicator: Approach Mode Field<br />

The “Mode Indicator: Approach Mode” is a 1-bit field that shall (242AR3.148-A) be<br />

used to indicate whether the Approach Mode is active or not.<br />

a. The ADS-B Transmitting Subsystem shall (242AR3.148-B) accept in<strong>for</strong>mation from<br />

an appropriate interface that indicates whether or not the Approach Mode is active.<br />

b. The ADS-B Transmitting Subsystem shall (242AR3.148-C) set the Mode Indicator:<br />

Approach Mode field in accordance with Table 3.2.29.<br />

Table 3.2.29: “Mode Indicator: Approach Mode” Field Values<br />

Values Meaning<br />

0 Approach Mode is NOT Active or Unknown<br />

1 Approach Mode is Active<br />

3.2.30 Mode Indicator: LNAV Mode Engaged Field<br />

The “Mode Indicator: LNAV Mode Engaged” is a 1-bit field that shall (242AR3.149-A)<br />

be used to indicate whether the Lateral Navigation Mode is active or not.<br />

a. The ADS-B Transmitting Subsystem shall (242AR3.149-B) accept in<strong>for</strong>mation from<br />

an appropriate interface that indicates whether or not the Lateral Navigation Mode is<br />

active.<br />

b. The ADS-B Transmitting Subsystem shall (242AR3.149-C) set the Mode Indicator:<br />

LNAV Mode Engaged field in accordance with Table 3.2.30.<br />

Table 3.2.30: “Mode Indicator: LNAV Mode Engaged” Field Values<br />

Values Meaning<br />

0 LNAV Mode is NOT Active<br />

1 LNAV Mode is Active

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