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Welcome to the United States Power Squadrons' Chart Smart Seminar. Aids to Navigation (Section 4). Section 4: Aids to Navigation Marks Lateral System Non-Lateral System Ranges Sound Signals Additional Topics. Class Agenda - cont'd. What Navigational Aids Tell Navigators.
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Welcometo the • United States Power Squadrons' • Chart Smart Seminar Aids to Navigation (Section 4)
Section 4: Aids to Navigation Marks Lateral System Non-Lateral System Ranges Sound Signals Additional Topics Class Agenda - cont'd
What Navigational Aids Tell Navigators • Deep, safe water • Shallow, hazardous water • Obstructions & channels • Ranges • And much more …
Lateral Systemclockwise along coasts or intracoastal waterways
Lateral SystemThe "3R" Rule • When Returning from sea, • Keep Red side of channel marks • To your Right - starboard Red - Right - Returning
“MARK” AN AID TO NAVIGATION YOU SEE WHILE BOATING • TWO CATEGORIES OF MARKS • Lateral Marks • Marks starboard and port sides of a route • Non-Lateral Marks • Supplemental aids having no lateral significance
IDENTIFICATION OF “MARKS” • In Daylight • Shapes • Colors • Numbers or letters • Sounds • At Night • Light color and patterns • Sounds Always Locate Marks On Your Chart
TYPES OF “MARKS” • BUOYS • Floating marks anchored at specific locations • BEACONS • Fixed marks permanently fastened to the earth’s surface • RANGES • Indicates center of a channel
Chart symbol • Diamond with a small position circle • Magenta disc around position circle, if lighted “BUOYS” • Floating Aids • Various shapes and colors • Position - approximate • Identified by • Number, letters, sound devices and lights
Permanently fixed to Earth's surface • Examples: • Lighthouses • Daybeacons • Identified by: • Numbers, letters, sound devices, lights • Chart symbols: • Unlighted - small triangle or square • Lighted - magenta flare with a black position dot “BEACONS”
“RANGES” • Marks center of a channel • Back mark is taller than front mark • When marks are aligned vertically, you are in the center of the channel
Chart Work Class Exercise “2” Using the Bowditch Bay practice chart, determine: What is the type of bottom found in the vicinity of G C "1" at Shark River _________________________________ The characteristics of RG “D” Fl R Gong (color, light sequence, sound) _________________________________ The special nav aid that is visible when approaching Oyster River ____________________________________ The characteristics of the stationary aids at the entrance to Perkins Cove______________________________________
Chart Work Class Exercise “2” Using the Bowditch Bay practice chart, determine: What is the type of bottom found in the vicinity of G C "1" at Shark River ___Hrd (hard bottom) ____________ The characteristics of RG “D” Fl R Gong (color, light sequence, sound) _lighted, flashing red, group of 2 then 1 flashes, sound is a "gong" type_ The special nav aid that is visible when approaching Oyster River _a range, true course of 245 degrees when aligned vertically; also, a mid-channel marker, RW "OR", Mo (A) light seq _ The characteristics of the stationary aids at the entrance to Perkins Cove _two 24 ft towers, lighted - flashing, on the end of each breakwater
End of Section 4 Aids to Navigation