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## Section 3 - Charts

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### Measuring Latitude and Longitude. One minute of latitude equals one nautical mile ... Using the Bowditch Bay practice chart, measure the Latitude and Longitude of: ... – PowerPoint PPT presentation

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Title: Section 3 - Charts

1
• Welcome to the
• United States Power Squadrons'
• Chart Smart Seminar

Charts (Section 3)
2
Class Agenda - cont'd
• Section 3 Charts
• Chart Scales
• What Charts Show
• Colors Used on Charts

3
What Charts Show Navigators
• Directions compass rose
• Depths heights
• Obstructions channels
• Aids to navigation key landmarks
• And much more

4
(No Transcript)
5
(No Transcript)
6
Colors Used on Charts
7
(No Transcript)
8
Measuring Direction
Direction is measured from 000? to 360?
clockwise from North
9
measured north and south from the equator
Latitude
10
measured east and west from the prime meridian at
Greenwich, England
Longitude
11
Measuring Latitude and Longitude
One minute of latitude equals one nautical mile
12
How Chart Scales Differ
13
How Chart Scales Differ
14
Chart Scales
Large Scale Chart Shows A Small Area
Small Scale Chart Shows a Large Area
15
Chart Work Class Exercise 1
Using the Bowditch Bay practice chart, measure
the Latitude and Longitude of
G C "1" at Shark River L
___________________
Lo __________________ RG
D Fl R Gong L
___________________ Lo
__________________ R 6 Fl R off Channel I
L ___________________ Lo
__________________ R N 2 at Perkins Cove
L ___________________ Lo
__________________
16
(No Transcript)
17
Chart Work Class Exercise 1
Using the Bowditch Bay practice chart, measure
the Latitude and Longitude of
G C "1" at Shark River L
___________________
Lo __________________ RG
D Fl R Gong L
___________________ Lo
__________________ R 6 Fl R off Channel I
L ___________________ Lo
__________________ R N 2 at Perkins Cove
L ___________________ Lo
__________________
41 42.0' N
071 31.1' W
41 46.3' N
071 19.7' W
41 40.3' N
071 19.8' W
41 36.2' N
071 15.4' W
18
End of Section 3
Charts
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