Navigation Training Humminbird Field Test Program Date: December 4 th , 2008

Navigation TrainingHumminbird Field Test Program

Date: December 4th, 2008

Special thanks to Keith Counsel for providing this presentation.

http://forums.sideimagingsoft.com/

GPS is an acronym for Global Positioning System.

GPS provides accurate position (latitude, longitude, altitude) information virtually anywhere on the earth through satellite technology and personal receivers on the ground.

A series of geosynchronous satellites broadcast a unique signal toward the earth once per second. A GPS receiver, receives the signals from these satellites and is able to determine position based on very slight differences in the time each signal is received and the receiver’s knowledge of the location of each of the satellites.

GPS Terms

COG- Course Over Ground

Course Over Ground is the current direction the boat is traveling measured in degrees from North (where 000° is North, 090° East, 180° is South, 270° is West). When the Course Over Ground is equal to Bearing, the boat is said to be “On Course” and will arrive at the destination in the most efficient manner.

N45deg

290deg

SOG- Speed Over Ground

Speed Over Ground is the measurement of the boat’s progress across a given distance; the speed measurement provided by GPS; accurate destination times can be derived from this measurement.

SPEED…………

Water Speed

The current speed of the water as it flows past the boat. (Must have optional TSW or SW Speed Sensor installed)

Bearing

Bearing is the direction to a destination waypoint measured in degrees from North (i.e. 321°, where 000° is North, 090° East, 180° is South, 270° is West).

N45deg

290deg

VMG- Velocity Made Good

Velocity Made Good is the speed of travel relative to the next waypoint on the route. The goal is for VMG to equal Speed.

Waypoint

Best Course

Actual Course

Start Actual speed always 10mph

10mph

6 mph

7 mph10 mph

Next to each orange line is it useful speed

VMG- Velocity Made GoodCommonly used in sailing…

Wind

Is it better to go slower into the wind or faster a little more off the wind?

Say red and green arrive at the same time… because red was going at a fast speed its VMG was the same as the boat going on the more direct course at a slower speed.

XTE- Cross Track Error

Cross Track Error is the straight-line distance of the boat from the intended Track. XTE measures how far the boat is off course, and also triggers the Off Course Alarm.

Start Waypoint

Off Course alarm

XTEXTE

XTE

GPS Diagnostic Screen

Date, Time, speed, course, and Altitude are all calculated from the GPS signal we receive.

It takes about 12-13 mins for a 100% signal to be accrued but we start to have acceptable signal from 30sec to 2mins. Internal GPS units do take longer to accrue signals.

Fix Type - (No Fix, 2D Fix, 3D Fix, Enhanced.) Enhanced fix means we have started to use info from WAAS.

HDOP - Horizontal Dilution or Precision - This data comes from the current satellite configuration. We will run any were from 0.6 to 3 normal. Lower number means better.

EPE - (Estimated Position Error) unit take a number of factors to calculate an ESTIMATED possible error. (2.5m is our call out)

What is WAAS?

WAAS = Wide Area Augmentation System.

WAAS is a complementary technology to GPS that provides enhanced accuracy through correction signals broadcast from Federal Aviation Administration WAAS satellites stationed over the USA.

These secondary signals are automatically received by most GPS Receivers. With WAAS signal, GPS accuracy is improved to within 3 meters 95% of the time.

Outside the United States, regional governmental coalitions have created similar systems such as EGNOS (Europe) and MSAS (Japan).

Main Menu- NAV Tab

Main Menu- Nav TabCurrent Track

Color By Depth

Main Menu- Nav TabSaved Track

Same options as Current Track but you must select the track you want to affect.

Good thing to note- say you have a track that you do not want to get rid of but do not want to see. You can do this via this menu option (edit).

Main Menu- Nav TabWaypoints

Main Menu- Nav TabRoutes

Routes are multiple destinations navigation that you want to get to… On water you can go as the “crow” flies often, but some times you need to go around a island, stump field, or some other no-entry area, that is where routes come in.

Main Menu- Nav TabRoutes CONT.

Main Menu- Nav TabChart Orientation

NORTH-UP

COURSE-UP

Main Menu- Nav TabWaypoint Decluttering

ON

OFF

Main Menu- Nav TabTrolling Grid Rotation

Why use this?- Girds are great way to ensure you do not go back over area already covered, by rotating it you get a reference.

Why only 89deg?- 90deg is 0deg, it is a square.

Main Menu- Nav TabTrackpoint Interval and Track Min Distance

These two actually work together.

Let say you are moving at 60’ per min.

Now you have your trackpoint interval at 1 second and Track Min Distance at 16’That means the trackpoint interval is saying put a trackpoint every 1sec but the min distance says no you must be at least 16’ away from the last.Let see if I can explain this better…

Main Menu- Nav TabTrackpoint Interval and Track Min Distance - Example - Speed 60’ per min (1’ per sec)

Trackpoint Interval- 1 secTrack Min Distance- 5’





Why is this useful? - You are limited on the total number of trackpoints in the unit!

Main Menu- Nav TabTrack Color Range

Main Menu- Nav TabTrack Color Range

Main Menu- Nav TabMap Datum

Main Menu- Nav TabCourse Projection Line

VISIBLE HIDDEN

Main Menu- Nav TabExport and Delete all Nav Data

Export and Delete only affect saved Tracks, not your current track!

For export to work you must have an SD card in the unit.

Main Menu- Nav TabContinuous Navigation Mode

What does it do? If you are navigating to a point, when you arrive, the unit does not stop navigating to that point unless you cancel.

Why is this useful? No anchor zones or you want to not anchor and stay over the same point or near the same point.

Main Menu- Nav TabGPS Receiver Override

This lets you choose which GPS receiver to use…if they are connected.

Order:AutoInterLink GPSExternal GPSInternal GPSRemote External GPSRemote Internal GPS

Navionics

Navionics Icons

Port

Current Station

Tide Station

Snapshot of item/port

BuoyBoat Ramp

Navionics Platinum & Platinum+ Options

Features:New Menu

Satellite overlays. Overlays only go so far away from shore, remember these are marine maps.

Ability to adjust how transparent the overlay is.


New Features:Pilot Book- contains detailed info on the port (depends heavy on what Navionics has) This is a new screen called “Chart plus pilot book view” Cursor thought by using the cursor button and “goto” button.

If you press info and select port then you can get the traditional port info, the pilot book entry for that port or an aerial photo of the port.

Platinum+

Platinum


Platinum+

Look at the dock

Look at the dock

Platinum


Platinum+

Platinum


Platinum+

Platinum


Main Menu- Chart Tab

Main Menu- Chart TabChart Detail Level

Main Menu- Chart TabMap Borders

Navionics data is made up of thousands of maps…Even Uni-map is made of multiple maps(Uni-map is a Navionics Product that we purchased.)

Main Menu- Chart TabLat/Lon Grid

Main Menu- Chart TabSpot Soundings

Main Menu- Chart TabNavaids on Bird’s Eye View

aka- Buoys

Main Menu- Chart TabShaded Depth

Something interesting people are doing with shaded depth is if the water level is extremely low on their lake they are using the shaded depth to give them a new outline of the lake.

Main Menu- Chart TabChart Select

Allows someone override the unit chart selection…

Main Menu- Chart TabNVB Chart Preference (only in NVB units)

Allows a user to choice which chart type to use.

Main Menu- Chart TabNVB Chart Preference(only in NVB units)

Why would you want to be able to do this?

Can occur is areas where Gold and Hotmaps meet.

Main Menu- Chart TabSet Simulator Location

This will allow you to start up in simulator mode where ever you set it too. Default is Miami on Domestic units and England on International units.

Cursor to the location then go to “Set Simulator Location”

Main Menu- Chart TabMap offset

Cursor to the location then go to “Set Map Offset”

In order to make another offset you must clear the active map offset first… if active, “clear Map offset” will be in the menu where “Set Map Offset” was.

Map Offset does not affect GPS or waypoint position.

MOB

MOB- Man Over Board Press and hold the “GoTo” Button, once MOB mode starts you

must cancel in order to do any other navigation

The Waypoint name means something…

MOB06141130 means MOB on 06/14 at 11:30

GR16 vs GRHA

Scatter Plot over 24 hours 8 Meters

6 Meters

4 Meters2 Meters

GR16

GRHAAccuracy (m) * GR16 GRHA

CEP (50%) 2.0 0.9

95% (Garmin) 4.0 1.8

Questions?

Please feel free to post any questions concerning the GPS Navigation Options at

http://forums.sideimagingsoft.com/index.php?topic=128.new

http://forums.sideimagingsoft.com/index.php?topic=128.new

Documents

Navigation Training Humminbird Field Test Program Date: December 4 th , 2008