
welcome to Marine Courses Center today we will complete introduction to navigation & navigation meaning & navigation definition
Chapter One
Navigation and Shape of the Earth
part C
1.6. Units of measurement
1.6.1 The sea mile:
1.6.1.1 The length of the sea mile:

1.6.1.2 Cable:

1.6.2 The international nautical mile:
This is a standard fixed length of 1852 meters and is denoted by (n.miles).
1.6.3 The knot:

1.6.4 The geographical mile:
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1.7 Linear measurement of latitude:

1.8 The linear measurement of longitude:

1.9 Rhumb line:
a line which cut all meridians at same angel

1.10 Departure:
