Piper ARCHER III Pilot Operating Handbook page 267

PA-28-181, ARCHER III
SECTION 2 - LIMITATIONS (continued)
J. If not previously defined, the following default settings must be made in
the "SETUP 1" menu of the GNS 430 prior to operation (refer to Pilot's
Guide for procedure if necessary):
1. dis, spd......... m t (sets navigation units to "nautical miles" and "knots")
2. alt, vs...........ft fpm (sets altitude units to "feet" and "feet per minute")
3. map datum...WGS 84 (sets map datum to WGS-84, see not below)
4. posn.............deg-min (sets navigation grid units to decimal minutes)
In some areas outside the United States, datums
other than WGS-84 or NAD-83 may be used. If
the GNS 430 is authorized for use by the
appropriate Airworthiness authority, the required
geodetic datum must be set in the GNS 430 prior
to its use for navigation.
ISSUED: JULY 12, 1995
REVISED: JULY 14, 2000
n k
NOTE
SECTION 9
SUPPLEMENT 12
REPORT: VB-1611
5 of 8, 9-67