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Index
82 GPSMAP 640 Owner’s Manual
H
hazard colors 44
heading 34
heading line 42
head up 42
high pressure center 50
home
setting a location 56
home screen 5
hurricanes 49
I
ID number
waypoints 35
isobars 51
J
JPEG image les 63
K
keel offset
adjusting 37
keyboard 57
language mode 67
layout 66
kilometers 66
L
land only 13
lane width 44
language
changing 33
language settings 67
lightning 48
lightning bolt icons 48
lithium-ion battery 72, 74
low pressure center 50
M
map
adding 73
browsing 58
detail level 67
enabling detail maps 68
Map Info button 68
settings 67
updating 73
version 68
viewing 67
zooming 59
map datum 35
MapSource 63, 73
MapSource data 30
Mariners Eye 3D 11
hazard colors 44
max speed, reset 62
measure
units 34
menu page 5, 54
messages 76
miles 66
moon phase 28
moon rise/set 28
mute
audio 67
my boat 37
My Data 65
N
National Weather Service 49
navigation 41, 61
mode 66
settings 66
navigation chart 8
nearby stations 27
NEXRAD 48
next turn 61
NMEA 35
north up 42
numbers
viewing 27
O
occluded front 50
off
heading line 42
off road, routing 59, 60, 66
on-screen keyboard 57
other boats 37
output, audio 67
overlay numbers 34, 40
P
panning 8
Perspective 3D 10
photos 13
points of interest 57
port types 35
precipitation 48
pressure gradient 51
pressure isobars 51
pressure unit settings 34
projected path 48
Q
QWERTY keyboard 66
R
range rings 44
recently found locations 57
registering ii
resetting
the max speed 62
the trip data 62
your GPSMAP 640 72
rings 44
routes
adding a stop 55
cancel 17
custom 59–60
90


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