National
Navigation System
GPS
Division
presents
Routes
A waypoint
(WPT or WP)
is a designated
location with
geographic
Coordinates—a Fix.
A group of
waypoints, linked
together in a
logical sequence
on a GPS, is
called a “route.”
Entering Waypoints
Enter in name/icon.
Enter LAT/LON.
Enter message
(not recommended)
Waypoint number.
(Keep it simple)
Menu of waypoint
options at bottom.
Bearing and Distance
0001
GPS
Position
This
is not a Page
compass
Direction
bar reading!
at
top of screen.
Course and Speed
Mileage and Altitude
Position
Time
Waypoint List
Waypoint List: 0020 Name:
__________________________
0016 42 12.06 N 070 41.90 W
0017 42 05.62 N 070 36.40 W
0018 41 55.10 N 070 30.40 W
0019 41 46.12 N 070 28.75 W
0020 ** **.** N *** **.** W
0021 42 19.60 N 071 00.10 W
0022 ** **.** N *** **.** W
0023 ** **.** N *** **.** W
Set Up Waypoint
Set up waypoint:
________________________
Display position as:
0020
LAT/LON
42 16.50 N
071 39.55 W
A simple
waypoint
entry screen
Verifying your present
position as a waypoint
WPT 4
Use a simple numbering system.
Do not place your position on top of the
Aid. Risk of collision!
Validate every waypoint before
using it as a permanent waypoint
in a route.
WPT 1
WPT 3
WPT 2
Waypoints are used extensively in
GPS navigation:
• As boundaries between
voyage segments – LEGS.
•
To mark turning points,
destinations, and aids to
navigation.
•
To mark hazards to navigation.
Waypoint Use
Marks
hazards
to
Mark
the
Marks the turn in
navigation
or
boundaries
a channel
obstructions.
between
legs.
WPT 1
Rock
WPT 4
WPT 3
WPT 2
GPS receivers enable waypoints to be
entered and stored in various ways.
A sequence of waypoints can define a
planned route.
Most GPS receivers store routes as well
as waypoints.
Select waypoints that can be
easily verified by other methods-visual fixes, soundings, radar,
etc.
NEVER rely on one
means of navigation.
It is important to
check your chart
before establishing
WPTs.
If your course
crosses an island,
the GPS receiver will
direct you to navigate
over this hazard.
WPT 02
WPT 01
Why create a route?
Routes are lists of sequential
waypoints.
WP 4
GPS can automatically advance
you to the next waypoint.
Routes can be reversed to retrace
your original track.
Routes keep you from wandering
into danger and shorten the
distance that you travel.
WP 1
WP 3
WP 2
WP 4
Editing Routes
• GPS receivers should allow you to
delete, move, or append
WPT 3
waypoints.
• In this case:
WPT 2 will be deleted and moved.
WPT 3 will be changed.
WPT 2
WPT 4 will be added.
WPT 3
WPT 1
WPT 2
ROUTE Navigation
WPT 2
Used by boats under power
when they have to stay in a
channel or follow an exact
course line
Useful functions:
 Cross Track Error (XTE)
 Course To Steer (CRS)
 Time To Go (TTG)
 Automatic course change at
next waypoint (WPT)
 Total distance to end of leg
(DTG)
 Total time to end of route.
WPT 1
WP 3
On
your nautical
chart, stick
Determine
the
Measure, plot,
small labels showing the
LAT/LON
and label for
Establish
a
Waypoint
Number
beside
your Waypoint
course
each
XTE safety
each WPT.
andlines.
establish
zone
Update
your in
Waypoints
Trip Log.
your
GPS.
WP 2
WP 1
ANIMATION
Waypoint Listing
WPT RTE LL No. Description
001
1
Float at Dorchester Yacht Club
003
1
004
1
11230 Dor. Bay Lighted Buoy 12
005
1
11210 Dor. Bay Lighted Buoy 5
006
1
11200 Dor. Bay Buoy 3
007
1
11579 Western Way Buoy 9
008
1
Right Pier Long Island Bridge
009
1
11554 Western Way Lighted Buoy 4
010
1
11514 Peddocks Is, Channel Buoy 2P
011
1
11395 Nantasket Rds Lighted Buoy 11
012
1
11370 Nantasket Rds Lighted Buoy 9
013
1
11355 Nantasket Roads Lighted Buoy 3
014
1
00435 Harding Ledge Lighted Bell Buoy 1HL
015
1
00445 Davis Ledge Lighted Gong Buoy 1DL
016
1
12258 Scituate Approach Lighted Gong Buoy SA
017
1
12490 Farnum Rock Lighted Bell Buoy 6
018
1
13035 Mary Ann Rocks Lighted Whistle Buoy 12
019
1
13065 Cape Cod Canal Entrance Buoy 7
Morrissey Blvd Bridge
TRUE
Meas'd
HDG
HDG
Start
112
069
041
065
126
137
139
073
064
058
086
109
118
Dist
GPS
Latitude
Longitude
Dist
Deg
Deg
M ins
TOTAL ROUTE
020
13090 Barnstable Harbor Entrance Lighted Bell BH
021
2
11195 Dorchester Bay Buoy 2
022
2
10875 Boston Main Channel Lighted Buoy 3
023
2
10790 Nixes Mate Lighted Bell Buoy 15
0.239
0.704
0.764
0.931
0.392
0.856
0.993
0.580
1.638
0.596
1.298
1.700
4.765
042 18.220 N
071 02.830 W Outer Bridge Pier - South
10-Jun-01
042 18.470 N
071 01.940 W Lighted Red Buoy
10-Jun-01
042 19.050 N
071 01.267 W Lighted Green Buoy
10-Jun-01
042 19.450 N
071 00.130 W Green Can
10-Jun-01
042 19.220 N
070 59.700 W Green Can
10-Jun-01
042 18.520 N
070 58.820 W Right Pier of Bridge
10-Jun-01
042 17.770 N
070 57.940 W Lighted Red Buoy
10-Jun-01
042 17.940 N
070 57.190 W Red Nun
10-Jun-01
042 18.660 N
070 55.200 W Lighted Green Buoy Fl G 2.5s
10-Jun-01
042 18.980 N
070 54.520 W Green Buoy
10-Jun-01
042 19.080 N
070 52.770 W Green Buoy
10-Jun-01
042 18.520 N
070 50.600 W Lighted Green Buoy Fl G 4s
10-Jun-01
042 16.300 N
070 44.900 W Green Buoy
4.751
7.656
11.426
8.521
47.810
042 12.100 N
070 41.900 W Red and White Stripes
042 05.620 N
070 36.400 W Red Buoy
041 55.100 N
070 30.400 W Red Buoy
041 46.600 N
070 29.600 W Red Buoy
024
2
10768 South Channel Lighted Buoy 10
025
2
10740 South Channel Entrance Buoy 1
026
2
00410 Boston Lighted Horn Buoy B
027
3
028
3
10390 North Channel Lighted Buoy 3
029
3
030
3
031
3
032
3
033
099
061
080
064
042
048
W
N
W Red and White Stripes
042 19.600 N
071 00.100 W Red Nun
042 19.540 N
071 59.300 W Green Buoy
N
W Green Buoy
042 20.73 N N
070 55.12 W W Red Buoy
042 21.900 N
070 53.800 W Green Buoy
042 22.700 N
070 47.000 W
10735 North Channel PR Junction Buoy PR
042 20.500 N
070 56.200 W
028
10680 North Channel Entrance Lighted Whistle Buoy NC
047
Outer Breakers Fl r 4s Bell "4"
031
10410 Tinkers Rock Gong Buoy TR
038
10430 Marblehead Channel Buoy 1
335
042 21.900 N
070 55.200 W Green Buoy
042 22.500 N
070 54.300 W Red and White Stripes
042 27.600 N
070 50.300 W Red Buoy
042 28.900 N
070 48.900 W
Green Can
10560 Nahant Rock Buoy 1
Green Can
034
035
4
Fl R #10 Lighted Buoy Main Ship Chan.
042 20.69 N
071 00.70 W
036
4
Can #5 Small Boat Channel
042 20.48 N
070 59.940 W Green can
037
Recheck position
4
Nun #4 Small Boat Channel
042 20.46 N
070 59.61 W
Red Nun
Fl R #10 Main Ship Channel
042 20.69 N
071 00.70 W
Red Lighted Buoy.
038
039
040
041
042
043
044
ROUTE PLC01
Date
071 03.130 W Dock
N
152
148
157
176
Type of Mark
M ins
042 18.310 N
Added line showing
vessel direction 095º T
Highway
Page on
GPS
Next
waypoint
Difference
between line and
the center of the
road is XTE
(Cross Track
Error)
Turn to starboard to go
to next waypoint
GPS Route Page Display
Perspective view
of upcoming
waypoints
Shows if you are
heading for next
waypoint
Customized data
fields not needed.
Arrival Alarm
Sounds whenever the
boat penetrates an
adjustable ring around a
waypoint.
1/2 M
Alarm Sounds
Initiates new heading
data for the next leg in
your route.
Note that waypoint is
positioned just off the
ATON not on top of it.
Course and Speed Display
213 deg.
23.4 kn
Shows:
 Course
– magnetic or true
 SOG in knots.
MAN OVERBOARD
_________________________________________________
C 241
DIST
TIME
MOB
POS
B113
1.89 nm
8 min
42 41.56N
071 01.44W
If someone falls overboard, press the
MOB key. Display shows:
 Present course of your boat.
 Bearing to person in water.
 Distance to person in water.
 Elapsed Time in minutes.
 Position of MOB.
Estimated Time of Arrival (ETA_
ETA:
Arrival Time
Date:
08:41
08:03:2002
ETA mode: MANUAL ETA speed: 10.0 kn
AVN:
Velocity:
12.5kn
Planned arrival time:
07:20
Date:
08:03:2002
_________________________________________
WP: 003
ETA refers to an inserted local time.
AVN—Approximate Velocity Necessary
is automatically calculated in knots after
you enter the ETA data.
Any questions ?