Navigation Systems GPS Set Ups
Vertical DatumVertical Datum
Select a unit of measure for water depth:
–Feet,
–Fathoms, or
–Meters.
Depth ReferenceDepth Reference
Refer to the General Information Block on your NOAA Chart for the correct
depth (vertical) datum.
Soundings in Fathoms at MLLW-Mean Lower
Low Water.
Horizontal DatumHorizontal Datum
Update your GPS with the HORIZONTAL DATUM
referenced on the nautical chart that you are using.
“WGS84”
Horizontal Datum
Distance
Select a unit of measure for DISTANCE:
–Nautical Miles–Statute Miles
When you are using your GPS on a boat, always set
the Distance Unit of Measure to Nautical Miles.
SpeedSpeed
Select a unit of measure for SPEED:
–Nautical miles per hour - KNOTS.
–Statute miles per hour - MPH
When you are using GPS on a boat, set the speed
unit of measure to KNOTS
– Nautical Miles Per Hour.
(May be automatic)
Course and BearingsCourse and Bearings
Select a heading format:
–TRUE
–MAGNETIC
Update your GPS set
Time FormatTime Format
Select a time format:
–24 hour clock format
–12 hour clock format
Update your GPS set
GPS Time SetupGPS Time Setup
Select a Time Setup.
–UTC
–Local time
Update your GPS Set
Altitude ModeAltitude Mode
Set your GPS for the height of your GPS
antenna at sea level.
Update your GPS Set
RayNav 300
GPS 76-Handheld
IN (ZOOM) OUT
NAV
POWER (LIGHT)
QUIT
ANTENNA
CURSOR
PAGE
MENU
ENTER
SCREEN
Set the GPS Alarms!Set the GPS Alarms!
*XTE Alarm.
*Anchor Alarm.
*Waypoint Arrival Alarm
Waypoint Arrival Alarm Waypoint Arrival Alarm IllustratedIllustrated
An arrival alarm sounds whenever the boat crosses an adjustable ring around the destination waypoint.
Navigation setup:
Datum 000: Datum Name: WGS84 Delta position: 0 00.000N 0 00.000W Course & bearing as: Magnetic Navigation mode: Rhumbline Auto waypoint shift: WP-line WP circle alarm ON 0.10 nm XTE alarm distance ON 0.50 nm Anchor alarm OFF 0.10 nm
Datum – from nautical chart of the area.
Delta position – offset or delta position to WGS84 from nautical chart.
Course and bearing – select magnetic or true.
Navigation mode – rhumbline navigation for shorter trips, great circle for long trips especially in the high latitudes.
Auto waypoint shift – automatic shift to next waypoint.
WP circle alarm – Alarm sounds when you enter the circle. WTE distance alarm – Sounds when you exceed on of the cross track boundaries.
Anchor alarm – Set when you anchor. Sounds when your drift beyond the parameter from the anchored position.
Horizontal Datum
Course and Bearings
Navigation Mode
Alarms:
WPT
XTE
Anchor
Unit of Measure ScreenUnit of Measure Screen
Set up for Units
Depth/Altitude in: FEET
Distance in: NAUTICAL MILES
Speed in: KNOTS
Temperature in: FAHRENHEIT
WIN change interval: 05 sec MANUAL
Display text in: ENGLISH (US)
RayChart 420
Your position is here
Unit of Measure ScreenUnit of Measure ScreenNavigation Set up
Datum Name: World Geodetic System 1984
Delta position: 0-00.000N 0-00.000W
Course and bearings: TRUE
Navigation Mode: RHUMBLINE
WP circle alarm: ON 0.10nm
XTE alarm distance: ON 0.10nm
Anchor alarm OFF 0.00nm
Unit of Measure ScreenUnit of Measure ScreenPosition Setup:
Manual antenna altitude 2m
Altitude mode: MANUAL
Display depth in POS display: YES
DGPS input format: RTCM 1.04
DGPS: data 0, max 2, test 1860
Speed and course filter level: 3
Start Position: LAT_______ LON ________
ANY QUESTIONS?ANY QUESTIONS?What type of speed is developed
by a GPS set as you move your boat over a course line?
Speed Thru the WaterSpeed Thru the WaterSpeed Over the GroundSpeed Over the Ground
Ded Reconing LineDed Reconing LineSpeed Made GoodSpeed Made Good