Basic Terrestrial Navigation part 3
Basic Terrestrial Navigation part 3
welcome to Marine Courses Center today we will complete Introduction to Navigation & Navigation Meaning & Navigation Definition
- Basic Terrestrial Navigation part 1
- Basic Terrestrial Navigation part 2
- Ships’ Manning | catering department | seamanship | part 5
- Ships’ Manning | deck officer | Maritime Deck department | seamanship | part 3
1.5.4 Difference of latitude (d.lat.) IN BASIC TERRESTRIAL NAVIGATION :
The rule for finding d.lat. can thus be summarized as follows:
· Same names subtract
· Opposite names add.
In northern hemisphere:
Ø D.lat. will be named SOUTH (S) if the ship is moving from a greater latitude (N) to a smaller latitude (N).
Ø D.lat. will be named NORTH (N) if the ship is moving from a smaller latitude (N) to a greater latitude (N).
In southern hemisphere:
Ø D.lat. will be named NORTH (N) if the ship is moving from a greater latitude (S) to a smaller latitude (S).
Ø D.lat. will be named SOUTH (S) if the ship is moving from a smaller latitude (S) to a greater latitude (S).
Ø If both latitudes have opposite names, d.lat. will have the same sign as the arrival latitude.
1.5.5 Difference of longitude (d.long.) IN BASIC TERETRIAL NAVIGATION:
In Eastern hemisphere:
Ø D.long. will be named EAST (E) if the ship is moving from a smaller meridian (E) to a greater meridian (E).
Ø D.long. will be named WEST (W) if the ship is moving from a greater meridian (E) to a smaller meridian (E).
In Western hemisphere:
Ø D.long. will be named EAST (E) if the ship is moving from a greater meridian (W) to a smaller meridian (W).
Ø D.long. will be named WEST (W) if the ship is moving from a smaller meridian (W) to a greater meridian (W).
Remarks:
A slight complication may appear if the sum of the two longitudes is greater than 180°, in this case the d.long. will be 360° minus the sum of the two longitudes. Consequently, the sign of d.long. will be changed.
check our free lectures on our facebook page Marine Courses Center
Check also our related course for OOW and For 2nd Mate and chief Mate
- Ship stability LECT 1
- Ship stability LECT 2
- Celestial Navigation LECT 1 | The Concept Of Celestial Sphere
- Celestial Navigation LECT 2 | Systems Of Coordinate Of Celestial Sphere
- Celestial Navigation LECT 3 | Systems Of Coordinate Of Celestial Sphere
- Celestial Navigation LECT 4 | Systems Of Coordinate Of Celestial Sphere Part 3
- Celestial Navigation LECT 5 | Chapter 3 Diurnal motion Celestial Navigation
- Celestial Navigation LECT 6 | Chapter 4 Annual Motion
if you have any question kindly please contact with me via ICQ and here how to contact with me via ICQ click here
Next post
introduction to navigation | navigation meaning | navigation definition | Part 4
31/07/2020
You may also like
MAINTENANCE REQUIRED ON LIFEBOAT FALLS:
17 March, 2023
CHECKS TO BE MADE ON A LIFEBOAT: Ensuring Safety at Sea
17 March, 2023