Piper PA-28-236 DAKOTA, Pilot Operating Handbook

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PIPER AIRCRAFT CORPORATION SECTION 9
PA-28-236, DAKOTA SUPPLEMENT 9
ISSUED: JULY 23, 1982 REPORT: VB-910
9-65
Figure 7-3 (cont)
11. NAVIGATION (NAV) MODE SELECTOR BUTTON - When
pushed, will select the Navigation mode. The mode provides all
angle intercept (with HSI) or a fixed angle intercept of 45° (with
DG), automatic beam capture and tracking of VOR, RNAV or
LOC signals. The NAV annunciator will flash until the automatic
capture sequence is initiated.
12. HEADING (HDG) MODE SELECTOR BUTTON - When
pushed, will select the Heading mode, which commands the
airplane to turn to and maintain the heading selected by the
heading bug on the DG or HSI. A new heading may be selected at
any time and will result in the airplane turning to the new heading
with a maximum bank angle of about 20°. Selecting HDG mode
will cancel NAV, APR or BC track modes.
13. ALTITUDE HOLD (ALT) MODE SELECTOR BUTTON -
When pushed, will select the Altitude Hold mode, which
commands the airplane to maintain the pressure altitude existing
at the moment of selection. Engagement may be accomplished in
climb, descent, or level flight. In the APR mode, altitude hold will
automatically disengage when the glide slope is captured.