united states coast guard u.s. coast guard auxiliary approved uscg auxiliary - department of...

United States Coast GuardU.S. Coast Guard Auxiliary

United States Coast GuardU.S. Coast Guard Auxiliary

Basic Coastal Navigation - Chapter 4Approved USCG Auxiliary - Department of Education

Copyright ©2004 Coast Guard Auxiliary Association, Inc.

BasicCoastal Navigation

BasicCoastal Navigation

Chapter 4Chapter 4

Navigator’s Tools & InstrumentsNavigator’s Tools & Instruments

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Navigator’s ToolsNavigator’s Tools

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Good Quality Tools:Buy the best quality you can afford.Plated, stamped steel perish quickly in marine environment.Good tools, good care = long life.

Good TechniqueUse the right tool for the purpose.Practice using the tool.

Accuracy Depends OnAccuracy Depends On

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PlottersPlotters

Draw straight lines.

Measure angles with respect to longitude.

e.g. Measure directions

Many types.

Choose according to personal preference.

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Parallel Rules

Plotting ToolsPlotting Tools

Paraglide

Course Plotter

Course Protractor

Three-ArmProtractor

Vecta Rose

Paraglide(Compact)

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More Plotting ToolsMore Plotting Tools

Chart Protractor

Triple Parallel

Rules

Protractor

Triangles

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DividersMeasure or mark off distances on a chart.

Pointed both arms.

Drafting compass.Used for swinging an arc.

Dividers & CompassDividers & Compass

Compass

Dividers

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Reliable time piece essential:

Dead reckoning navigation.Running a search pattern.Identifying light patterns.

24 Hour display helpful.Stopwatch a useful function.

Watch or ClockWatch or Clock

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Used to solve problems in

time - speed – distance.

If you know two variables,

you can solve for the third.

Alternate: solar or battery

powered calculator.

Nautical Slide RuleNautical Slide Rule

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Binoculars andHand-held Compass

Binoculars andHand-held Compass

BinocularsLocating ATONS, Landmarks

Use 7 X 50

Hand-held CompassVisual bearings on ATONS or landmarks to establish LOP.

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Depth Sounder & GPSDepth Sounder & GPS

Depth sounder:Help prevent groundings.Aid in position-finding.

GPS:Position finding.Advanced navigation-related computations.

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SextantSextant

Classic use for celestial navigation.

Also useful for measuring horizontal and vertical angles

e.g. Distance off from vertical angle.

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Other ToolsOther Tools

Electronics:Radio Direction Finder

Radar

Loran C

Optical Range Finder

Lo-Tech StuffPaper

Pencils

Erasers

Pencil sharpener

Magnifier

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References:Nautical Chart NO. 1

References:Nautical Chart NO. 1

Explanation of nautical chart:

Symbols

Abbreviations

Terms

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References:Tide & Current Tables

References:Tide & Current Tables

Predictions of tidal events:

Tides

Tide differences

Tidal currents

Tidal current differences

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References:Notices to Mariners

References:Notices to Mariners

Updates and corrections:

Charts.

Hazards to navigation.

Available on-line.

http://www.navcen.uscg.gov/

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References:Computer Programs

References:Computer Programs

Tide & tidal current predictions

Charts

Real-time chart plotting

Voyage planning

Vessel management

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Other ReferencesOther References

Coast PilotWritten descriptions and navigational advice regarding waterways.

Light ListTabular compilation of ATON locations and descriptions.

Cruising guidesCommercially produced waterway descriptions and cruising advice.

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Your Most Important ToolYour Most Important Tool

PREPARATIONPREPARATIONPREPARATIONPREPARATION

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End of Chapter 4End of Chapter 4