Garmin GNS 430 Pilot's Manual And Reference page 210

SECTION 13 – MESSAGES,
ABBREVIATIONS, & NAV TERMS
VLOC transfer key stuck - The VLOC Flip-
flop Key is stuck in the enabled (or pressed)
state. Try pressing the VLOC Flip-flop Key again
to cycle its operation. If the message persists,
contact a Garmin dealer for assistance.
Waypoint already exists - The name just
entered for a user waypoint already exists in
memory.
Waypoint(s) have been replaced - One or more
user waypoints were updated during a unit-to-
unit crossfill operation.
Waypoint memory is full - The pilot has used
all 1000 user waypoint locations in the GNS 430' s
memory. Delete unwanted waypoint to make
room for new entries.
WGS 84 datum has been selected - The system
map datum was changed to WGS 84 because
the selected map datum was removed from the
current NavData card (database update), the data
card is missing, or the data card has failed.
13-8 GNS 430 Pilot's Guide and Reference