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ATONS
Right side of channel from seaNUN buoys,
Red colors
Even numbers
Red, Right, Returning
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AIDS TO NAVIGATION
Experimental Slide
Elements of A Chart(click above to open interactive chart)
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Lighted Buoys
Right side of channelRed color, Red light, Even numbers (82)
Left side of channelGreen color, Green light, Odd numbers (81)
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ATONSDAYMARKS-USED IN SHALLOW WATER RATHER THAN BUOYS
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NAVIGATION AIDS
JUNCTION BUOY
USES LETTERS INPLACE OF NUMBERS
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The top band in green, indicates the preferred channel.The bottom band in red indicates the subordinate channel.
The top band in green, indicates the preferred channel.The bottom band in red indicates the subordinate channel.
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Entrance to Naval Station Mayport Harbor(the subordinate channel)
Entrance to Naval Station Mayport Harbor(the subordinate channel)
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ATONS• Junction Daymark in Shallow Water
Assume this boat is Approaching From the Preferred Channel
Assume this boat is Approaching From the Preferred Channel
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ATONS
Isolated Danger AreaMay be passed on all sides.
Approach with Caution.
Isolated Danger AreaMay be passed on all sides.
Approach with Caution.
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• Non-Lateral Marks - US Aids
Non-Lateral Aids
Daymark
Spherical Buoy(unlighted)
1
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OBSTRUCTING NAVIGATION
• It is illegal to:• Anchor in a channel• Tie up to a buoy or ATON• Tamper with, deface, or move any
ATON• Obstruct a pier, wharf, boat ramp
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Intracoastal Waterway• From New Jersey to Texas.
• Red on Right from NJ to Texas
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Intracoastal Waterway
1
2
• ICW waterway uses yellow symbols to distinguish them from aids marking other waters.
• Yellow triangles to starboard side when going south.
• Yellow squares to port when going south. • A yellow horizontal band has no significance, only identifies aids as marking the ICW.
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Western Rivers
• Used on Mississippi and tributaries
• Not numbered
• Numbers below daybeacons• Indicate distance from mouth of river
1
2
3
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Non-Lateral Aids
Include Private MarkersOf Various Shapes And SizesInclude Private MarkersOf Various Shapes And Sizes
Mooring Buoys Which Are For Legally Securing Your Boat Away From A Dock Instead of Dropping An Anchor
Mooring Buoys Which Are For Legally Securing Your Boat Away From A Dock Instead of Dropping An Anchor
AndAnd
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Regulatory Markers
1
2
34
Provide Information and InstructionsProvide Information and Instructions
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REGULATORY MARKERS
This Marker defines slow speed boundaries at the channel’s edgeThis Marker defines slow speed boundaries at the channel’s edge
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Downtown Temporary Speed Zone When Flashing
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• Charts• Why important?• What information is
contained?
Navigating on Water
1
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NAVIGATION TOOLS
• CHARTS OF AREA
• CHART #1
• CHART CATALOG
• PLOTTING INSTRUMENTS• #2 PENCIL• DIVIDERS• PLOTTER
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Steering Compass
• Magnetic North
What is the
lubber line?
1
41© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission
We Steer to Magnetic We Steer to Magnetic NorthNorth
GPS can be set to display magnetic direction
42© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission
Magnetic CourseMagnetic Course
Compass Rose is a convenient Reference
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Piloting
Pre-Planning Routes by Compass Heading, Estimated Speed and Arrival TimePre-Planning Routes by Compass Heading, Estimated Speed and Arrival Time
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Provides Position as:
• Latitude and Longitude
• Direction, if moving
• Speed over bottom, if moving
• Chart Plotter GPS
• Position on chart
GLOBAL POSITIONING SYSTEMS (GPS)
45© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission
Language of NavigationLanguage of Navigation
GPS provides a 3-D position in space translated to coordinates on the earth
46© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission© 2003, RJ Sweet, “GPS for Mariners,” Reprinted with permission
Locate Position on ChartLocate Position on Chart
GPS “Position”Corresponds to A Position On The ChartRead in “Degrees”“Minutes” and “Seconds”
Information on real-world
objects provided by
charts.
Dangers Of Lowhead Dams
• Low Head Dams Are a danger
to boaters…….
….From both above and below.From above they are hard to see.Below, turbulent waters
….From both above and below.From above they are hard to see.Below, turbulent waters
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Locks
• Commercial traffic has priority
• Communication: channel 13 VHF-FM marine
1
2
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stand clear
approach
enter
Traffic Signals At Locks
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Bridges
• What needs to be considered?1
Check your chart for bridge clearancesCheck your chart for bridge clearances
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Bridges• Typical information found on bridge
fenders1
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Tides On Coastal Waters
• Gravitational forces of the moon and sun
• Tides fluctuate by many feet
• Docking affected by tide
• Local knowledge
• Don’t run aground
1
2
3
4
5
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Review Exercises
• An Aid To Navigation is any object external to the boat that 1. Helps a boater pilot a boat safely, 2. aids a boater in finding a position, and 3.___
• Warns a boater of danger• Marks the best fishing holes• Marks an area with water depths of at least 50 feet• Provides a place to tie to
1
a
b
c
d
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Review Exercises
• You are returning from sea and want to stay safely in the preferred channel. On what side of your boat would you keep a red and green horizontally-banded marker if the top band is red?
• Either side would be appropriate.• Port• You would stop and turn around (you are in an
exclusion area).• starboard
4
a
b
c
d
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Review Exercises
• Regulatory markers with orange circles and black lettering indicate:
• controlled areas.• dangerous areas.• exclusion areas where boats should keep out.• general information for the area.
9
a
b
c
d
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