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Technical Provisions for Mode S Services and Extended Squitter

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CD-14 <strong>Technical</strong> <strong>Provisions</strong> <strong>for</strong> <strong>Mode</strong> S <strong>Services</strong> <strong>and</strong> <strong>Extended</strong> <strong>Squitter</strong><br />

Auto pilot or<br />

flight director<br />

status<br />

DRAFT - Working Paper ASP TSGWP11-01 <strong>for</strong> review by the TSG during the meeting in June 2011 in Paris<br />

Auto pilot or<br />

flight director vertical<br />

mode<br />

Conditions: vertical status/altitude<br />

(FCU, FMS or aircraft)<br />

Target<br />

altitude<br />

used Bit 55 Bit 56<br />

Altitude hold (ALT) A/C ALT 0 1<br />

Descent (DES) FCU ALT > next FMS ALT FCU ALT 1 0<br />

Open descent<br />

(OPEN DES)<br />

FCU ALT ≤ next FMS ALT FMS ALT 1 1<br />

No next FMS ALT FCU ALT 1 0<br />

<strong>Mode</strong> used to descend directly to the FCU ALT<br />

disregarding the computed descent path <strong>and</strong> FMS<br />

constraints<br />

FCU ALT 1 0<br />

Climb (CLB) FCU ALT < next FMS ALT FCU ALT 1 0<br />

FCU ALT ≥ next FMS ALT FMS ALT 1 1<br />

No next FMS ALT FCU ALT 1 0<br />

Open climb (OPEN CLB) <strong>Mode</strong> used to climb directly to the FCU ALT<br />

disregarding the computed descent path <strong>and</strong> FMS<br />

constraints<br />

FCU ALT 1 0<br />

Take off (TO) FCU ALT < next FMS ALT FCU ALT 1 0<br />

FCU ALT ≥ next FMS ALT FMS ALT 1 1<br />

No next FMS ALT FCU ALT 1 0<br />

Go around (GA) FCU ALT > A/C ALT <strong>and</strong> FCU ALT < next<br />

FMS ALT<br />

Other vertical modes (final<br />

approach, l<strong>and</strong>, glide<br />

slope)<br />

FCU ALT > A/C ALT <strong>and</strong> FCU ALT ≥ next<br />

FMS ALT<br />

FCU ALT 1 0<br />

FMS ALT 1 1<br />

FCU ALT > A/C ALT <strong>and</strong> no next FMS ALT FCU ALT 1 0<br />

FCU ALT ≤ A/C ALT / 0 0<br />

/ 0 0<br />

Draft<br />

AP off <strong>and</strong> FD off / 0 0<br />

DRAFT - Working Paper ASP TSGWP11-01 <strong>for</strong> review by the TSG during the meeting in June 2011 in Paris

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