True/Magnetic Selection - Honeywell FMZ Series Pilot's Manual

Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter

True/Magnetic Selection

The FMS 1 MAINTENANCE 3/3 page, shown in Figure 6--135, is
dedicated to selecting true or magnetic headings for the FMS and the
HSI (horizontal situation indicator) heading display. When TRUE is the
active mode, all courses and headings displayed by the FMS are
followed by the letter T. When MAG is the active mode, all courses and
headings displayed by the FMS are followed by a degree symbol (_) on
the FMS pages.
00797.05
Figure 6- -135
FMS 1 MAINTENANCE 3/3
The active mode also reflects how courses are displayed on the HSI.
When the FMS is selected as the navigation source for the HSI, the
course displayed by the FMS is relative to the mode displayed for the
ACTIVE HDG MODE on this page.
The pilot toggles between magnetic and true by pushing the line select
key at 2R.
The RETURN TO SERVICE page is directly accessed by pushing the
line select key at 6L.
A28- - 1146- - 181
Navigation
REV 3 Mar 2009 6-181
Honeywell International Inc. Do not copy without express permission of Honeywell.