• Navigation - nautical distances (1of2)

    Answer to Navigation question 10 - Use dividers to on the Timor Sea chart below to find the distance in nautical miles between : a) the peak on Moa and the northern lighthouse on Wetar b) the lighthouses on Kisar and Lakor c) Recon light and the peak on Babar

    published: 02 Sep 2011
  • Measuring miles on a nautical chart

    How to measure distance on a nautical chart.

    published: 26 Jan 2016
  • Captain License Chart Navigation – Distance, Speed, and Time Overview

    This video is part of the online captain’s license course offered by US Captains Training. It is used in conjunction with classroom training and offered to the world for free via YouTube. The video goes over Distance, Speed, and Time Overview in the chart navigation section of US Captain’s Training’s Online Master Captain’s license course.

    published: 24 Feb 2015
  • Navigation - nautical distances (2of2)

    Answer to Navigation question 10 - Use dividers to on the Timor Sea chart below to find the distance in nautical miles between : a) the peak on Moa and the northern lighthouse on Wetar b) the lighthouses on Kisar and Lakor c) Recon light and the peak on Babar

    published: 02 Sep 2011
  • Measuring distance on a nautical chart

    How to measure distance on a chart and work out the time it will take to travel. Nautical navigation. Watersports training

    published: 27 May 2009
  • 34 fix position distances and compass bearings distances and compass bearings 1

    You can obtain a fix by combining two or more distances or distances and compass bearings. This is how you plot a fix position combining two or more distances: Let's assume you sail near the coast. The radar is in good working condition and in operation. Taking into account your last position, and after comparing the nautical chart's coast line with that on the radar screen, you spot two points on the screen, A and B, from where you can take distances. The equivalent ones on the nautical chart are points A and B. Using the radar's range marker you measure a distance of 5.2 nautical miles from point A, and 2.8 nautical miles from point B. You note the time - let's assume it is 0930 hours. Then return to the nautical chart, and using the dividers, span a distance of 5.2 nautical mil...

    published: 11 Apr 2014
  • Precise to scale Flat Earth Map coming part 5

    Part 5 really starting to take shape. Here's a short list of Airport to airport codes and distances. Remember, the distances are based on a ball shape earth, but even though the earth is flat, those distances are still relative and therefore useful. SYD to USH 5877 miles (9458 kilometers, 5107 nautical miles). http://www.airmilescalculator.com/distance/syd-to-ush/ DEL New Delhi to MAA 1096 miles (1764 kilometers, 953 nautical miles). DEL to CGK Jacarta 3105 miles (4997 kilometers, 2698 nautical miles). CGK to SYD. 3433 miles (5525 kilometers, 2983 nautical miles). MAA to CGK 2249 miles (3620 kilometers, 1955 nautical miles). MNL Manila to CGK 1734 miles (2791 kilometers, 1507 nautical miles). MNL to SYD. 3896 miles (6269 kilometers, 3385 nautical miles). DEL to MNL HKG H...

    published: 02 Jan 2016
  • The Nautical mile - What is it?

    In this video we discuss the relationship between the size of the earth and the nautical mile. A nautical mile is equal to one minute of latitude, which is equivalent to one sixtieth of a degree of latitude. If we know the circumference of the earth, we can find the length of a nautical mile.

    published: 01 Nov 2015
  • Lunar distance (navigation) - Video Learning - WizScience.com

    In celestial navigation, "lunar distance" is the angle between the Moon and another celestial body. The "lunar distances method" uses this angle, also called a "lunar", and a nautical almanac to calculate Greenwich time. By comparing that calculated time to the measured local time, the navigator can determine longitude. The method was used for some time during the 17th century, before the introduction of the marine chronometer. A similar method uses the positions of the Galilean moons of Jupiter. In celestial navigation, knowledge of the time at Greenwich and the measured positions of one or more celestial objects allows the navigator to calculate latitude and longitude. Reliable marine chronometers were unavailable until the late 18th century and not affordable until the 19th century....

    published: 29 Sep 2015
  • Nautical Miles & Knots

    via YouTube Capture

    published: 04 Jul 2013
  • Weather for Sailors

    A sailor's description of the various weather and oceanographic systems encountered at sea, and how these can be interpreted and dealt with by the small boat sailor without the volumes of internet based information and predictions available to land based arm-chair sailors.

    published: 21 Jul 2013
  • 25 running fix plotting

    This is how we plot a Running Fix Position: Assuming the course is 080° degrees and the speed is 8 knots, or 8 nautical miles per hour, we take a bearing of 045° degrees on Alfa rock at 0900, now convert the compass bearings to true bearings and we plot it on the chart. After 30 minutes we take a new bearing on the same rock that reads 015°degrees, now convert the compass bearings to true bearings and plot it on the chart along with the new time - 0930. Knowing the speed, the next step is to determine the distance that the vessel sailed from 0900 to 0930. For that we use the formula: D is equal to S times T divided by 60, where D is the distance in nautical miles, S is the boat speed, and T is the time in minutes. In our case: 8 knots times 30 minutes divided by 60 equals 4 nautic...

    published: 11 Apr 2014
  • Flat earth look at Ship routes

    Yes looks like sships dont like southern ocean seem to go nth then south The yatch map tells all

    published: 24 Apr 2017
  • 30 use of divider measuring distance 2

    How do you measure a distance that is longer that the span of your dividers? Assume that you are sailing from point A to point B. The true course is 110°, and you want to know how many nautical miles it is from A to B. However, the distance to be measured is greater than the divider's span. Use the dividers and span a distance of 10 miles on the latitude scale which is closest to point A and B. Walk the dividers along the course as many times as needed until you get close to point B, and mark the last point as point X. In our case we need to walk the dividers three times. That makes 3 times 10 miles, equalling 30 miles. Now measure the distance from point X to point B and apply this span on the latitude scale which is closest to point B. On the scale you find that in this case the dist...

    published: 11 Apr 2014
  • How to find the bearing and distance a boat travels using trigonometry

    http://www.freemathvideos.com In this video playlist you will learn how to graph the trigonometric functions for sine, cosine, tangent, cotangent, secant, and cosecant. You will learn how to identify the amplitude, period, phase shift, vertical, horizontal, translation, transformation, reflection, of the graph. Next we will explore the inverse of functions to find the angle when given a function.

    published: 09 Dec 2015
  • Sea Distance Calculator

    Sea Distance Calculator, Port to Port Distances, Transit Times ... http://www.marinevesseltraffic.com/2013/07/distance-calculator.html

    published: 13 Apr 2015
  • At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing no

    At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing north at 25 km/h. How fast is the distance between the ships changing at 4:00 PM?

    published: 18 Dec 2015
  • How to find port to port distance

    published: 23 Oct 2017
  • Calculating Distance with Latitude

    In this tutorial, Jennifer shows how you can use a location's latitude to determine how far north or south it is from another location. The same process can be used to calculate how far east or west a location is from another using longitude. One important reminder that is shown is how many minutes of latitude are in one degree of longitude.

    published: 14 Oct 2015
  • Navigation Basics - Reading a Nautical Chart - Kayaking Tips #48 - Kayak Hipster

    Some basics of navigation, I go through the following topics on how to read a nautical chart: - Depths - Buoys, RRR - Hazards - Latitude and Longitude - Distances - Compass Rose - Magnetic vs True North Kayak Hipster http://www.kayakhipster.com

    published: 16 Nov 2016
  • CRP-5: Distance conversions

    Part 2 of my CRP5 series, showing the way to use a CRP-5 to convert distances. The most useful conversions to know are: 1m = 3.28ft 1nm = 1,852m 1nm = 1.852km 1nm = 6,080ft 1nm = 1.15sm 1sm = 1,610m 1sm = 1.610km

    published: 21 Feb 2016
  • 36 fix position bearing and vertical sextant angle bearing and vertical sextant angle 1

    A Fix can also be obtained by combining a compass bearing and a distance of the same lighthouse. You can determine the distance knowing the height and the vertical sextant angle of the lighthouse. Let's assume you sail near the coast and, looking on your nautical chart, you spot the lighthouse A. Among the characteristics of the lighthouse, you read that it has a charted height of 103 meters or 338 feet. This is the height above mean high water spring tide. After calculating the height of tide at that time, the corrected height of the lighthouse is 105 meters or 345 feet. Use the sextant and measure the vertical angle of the lighthouse. Let's assume, after applying the index error, that the vertical angle is 2 degrees and 30 minutes. Knowing the corrected height and the corrected v...

    published: 11 Apr 2014
  • Great Circle Distance

    Calculate the distance between two cities.

    published: 20 Apr 2013
  • How to measure distance on a chart

    This short 'how to' film by Stormforce Coaching's Principal, Doug Innes, demonstrates how to measure the distance between two points on a chart, using latitude. Doug explains how to use a latitude scale and a set of dividers to measure a distance, and how to equate minutes and miles.

    published: 27 Sep 2012
developed with YouTube
Navigation  - nautical distances (1of2)
8:44

Navigation - nautical distances (1of2)

  • Order:
  • Duration: 8:44
  • Updated: 02 Sep 2011
  • views: 514
videos
Answer to Navigation question 10 - Use dividers to on the Timor Sea chart below to find the distance in nautical miles between : a) the peak on Moa and the northern lighthouse on Wetar b) the lighthouses on Kisar and Lakor c) Recon light and the peak on Babar
https://wn.com/Navigation_Nautical_Distances_(1Of2)
Measuring miles on a nautical chart
2:35

Measuring miles on a nautical chart

  • Order:
  • Duration: 2:35
  • Updated: 26 Jan 2016
  • views: 6542
videos
How to measure distance on a nautical chart.
https://wn.com/Measuring_Miles_On_A_Nautical_Chart
Captain License Chart Navigation – Distance, Speed, and Time Overview
4:31

Captain License Chart Navigation – Distance, Speed, and Time Overview

  • Order:
  • Duration: 4:31
  • Updated: 24 Feb 2015
  • views: 9877
videos
This video is part of the online captain’s license course offered by US Captains Training. It is used in conjunction with classroom training and offered to the world for free via YouTube. The video goes over Distance, Speed, and Time Overview in the chart navigation section of US Captain’s Training’s Online Master Captain’s license course.
https://wn.com/Captain_License_Chart_Navigation_–_Distance,_Speed,_And_Time_Overview
Navigation - nautical distances (2of2)
2:51

Navigation - nautical distances (2of2)

  • Order:
  • Duration: 2:51
  • Updated: 02 Sep 2011
  • views: 261
videos
Answer to Navigation question 10 - Use dividers to on the Timor Sea chart below to find the distance in nautical miles between : a) the peak on Moa and the northern lighthouse on Wetar b) the lighthouses on Kisar and Lakor c) Recon light and the peak on Babar
https://wn.com/Navigation_Nautical_Distances_(2Of2)
Measuring distance on a nautical chart
2:43

Measuring distance on a nautical chart

  • Order:
  • Duration: 2:43
  • Updated: 27 May 2009
  • views: 18904
videos
How to measure distance on a chart and work out the time it will take to travel. Nautical navigation. Watersports training
https://wn.com/Measuring_Distance_On_A_Nautical_Chart
34   fix position distances and compass bearings distances and compass bearings 1
1:48

34 fix position distances and compass bearings distances and compass bearings 1

  • Order:
  • Duration: 1:48
  • Updated: 11 Apr 2014
  • views: 13515
videos
You can obtain a fix by combining two or more distances or distances and compass bearings. This is how you plot a fix position combining two or more distances: Let's assume you sail near the coast. The radar is in good working condition and in operation. Taking into account your last position, and after comparing the nautical chart's coast line with that on the radar screen, you spot two points on the screen, A and B, from where you can take distances. The equivalent ones on the nautical chart are points A and B. Using the radar's range marker you measure a distance of 5.2 nautical miles from point A, and 2.8 nautical miles from point B. You note the time - let's assume it is 0930 hours. Then return to the nautical chart, and using the dividers, span a distance of 5.2 nautical miles on the latitude scale which is closest to the present position and which runs along the sides of the chart. Apply this span, placing one leg of the dividers at point A, and draw a semicircle near the course line. Now span a distance of 2.8 nautical miles and apply this span, placing one leg of the dividers at point B, and draw a second semicircle intersecting the first semicircle and near the course line. The point where the two semicircles intersect is the fix position at 0930 hours.
https://wn.com/34_Fix_Position_Distances_And_Compass_Bearings_Distances_And_Compass_Bearings_1
Precise to scale Flat Earth Map coming part 5
6:08

Precise to scale Flat Earth Map coming part 5

  • Order:
  • Duration: 6:08
  • Updated: 02 Jan 2016
  • views: 18655
videos
Part 5 really starting to take shape. Here's a short list of Airport to airport codes and distances. Remember, the distances are based on a ball shape earth, but even though the earth is flat, those distances are still relative and therefore useful. SYD to USH 5877 miles (9458 kilometers, 5107 nautical miles). http://www.airmilescalculator.com/distance/syd-to-ush/ DEL New Delhi to MAA 1096 miles (1764 kilometers, 953 nautical miles). DEL to CGK Jacarta 3105 miles (4997 kilometers, 2698 nautical miles). CGK to SYD. 3433 miles (5525 kilometers, 2983 nautical miles). MAA to CGK 2249 miles (3620 kilometers, 1955 nautical miles). MNL Manila to CGK 1734 miles (2791 kilometers, 1507 nautical miles). MNL to SYD. 3896 miles (6269 kilometers, 3385 nautical miles). DEL to MNL HKG Hong Kong to CGK 2027 miles (3263 kilometers, 1762 nautical miles). 4 h 20 min. HKG to MNL 713 miles (1147 kilometers, 619 nautical miles). 1 hour 51. DEL to HKG 2331 miles (3752 kilometers, 2026 nautical miles). HKG to PEK Beijing 1239 miles (1994 kilometers, 1077 nautical miles). PEK to SYD. 5576 miles (8974 kilometers, 4846 nautical miles). DYR East Russia, to FAI Alaska 1003 miles (1613 kilometers, 871 nautical miles). DYR to PEK 2924 miles (4706 kilometers, 2541 nautical miles). DME to DYR 3873 miles (6232 kilometers, 3365 nautical miles).
https://wn.com/Precise_To_Scale_Flat_Earth_Map_Coming_Part_5
The Nautical mile - What is it?
3:42

The Nautical mile - What is it?

  • Order:
  • Duration: 3:42
  • Updated: 01 Nov 2015
  • views: 9298
videos
In this video we discuss the relationship between the size of the earth and the nautical mile. A nautical mile is equal to one minute of latitude, which is equivalent to one sixtieth of a degree of latitude. If we know the circumference of the earth, we can find the length of a nautical mile.
https://wn.com/The_Nautical_Mile_What_Is_It
Lunar distance (navigation) - Video Learning - WizScience.com
2:48

Lunar distance (navigation) - Video Learning - WizScience.com

  • Order:
  • Duration: 2:48
  • Updated: 29 Sep 2015
  • views: 1397
videos
In celestial navigation, "lunar distance" is the angle between the Moon and another celestial body. The "lunar distances method" uses this angle, also called a "lunar", and a nautical almanac to calculate Greenwich time. By comparing that calculated time to the measured local time, the navigator can determine longitude. The method was used for some time during the 17th century, before the introduction of the marine chronometer. A similar method uses the positions of the Galilean moons of Jupiter. In celestial navigation, knowledge of the time at Greenwich and the measured positions of one or more celestial objects allows the navigator to calculate latitude and longitude. Reliable marine chronometers were unavailable until the late 18th century and not affordable until the 19th century. After the method was first published in 1763 by British astronomer royal Nevil Maskelyne, for about a hundred years mariners lacking a chronometer used the method of lunar distances to determine Greenwich time as a key step in determining longitude. Conversely, a mariner with a chronometer could check its accuracy using a lunar determination of Greenwich time. The method relies on the relatively quick movement of the moon across the background sky, completing a circuit of 360 degrees in 27.3 days. In an hour then, it will move about half a degree, roughly its own diameter, with respect to the background stars and the Sun. Using a sextant, the navigator precisely measures the angle between the moon and another body. That could be the Sun or one of a selected group of bright stars lying close to the Moon's path, near the ecliptic; Regulus was particularly commonly used. At that moment, anyone on the surface of the earth who can see the same two bodies will observe the same angle . The navigator then consults a prepared table of lunar distances and the times at which they will occur. By comparing the corrected lunar distance with the tabulated values, the navigator finds the Greenwich time for that observation. Knowing Greenwich time and local time, the navigator can work out longitude. Local time can be determined from a sextant observation of the altitude of the Sun or a star. Then the longitude is readily calculated from the difference between local time and Greenwich Time, at 15 degrees per hour. Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Lunar+distance+(navigation), which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
https://wn.com/Lunar_Distance_(Navigation)_Video_Learning_Wizscience.Com
Nautical Miles & Knots
3:53

Nautical Miles & Knots

  • Order:
  • Duration: 3:53
  • Updated: 04 Jul 2013
  • views: 19066
videos
via YouTube Capture
https://wn.com/Nautical_Miles_Knots
Weather for Sailors
1:32:09

Weather for Sailors

  • Order:
  • Duration: 1:32:09
  • Updated: 21 Jul 2013
  • views: 38345
videos
A sailor's description of the various weather and oceanographic systems encountered at sea, and how these can be interpreted and dealt with by the small boat sailor without the volumes of internet based information and predictions available to land based arm-chair sailors.
https://wn.com/Weather_For_Sailors
25   running fix plotting
2:12

25 running fix plotting

  • Order:
  • Duration: 2:12
  • Updated: 11 Apr 2014
  • views: 30132
videos
This is how we plot a Running Fix Position: Assuming the course is 080° degrees and the speed is 8 knots, or 8 nautical miles per hour, we take a bearing of 045° degrees on Alfa rock at 0900, now convert the compass bearings to true bearings and we plot it on the chart. After 30 minutes we take a new bearing on the same rock that reads 015°degrees, now convert the compass bearings to true bearings and plot it on the chart along with the new time - 0930. Knowing the speed, the next step is to determine the distance that the vessel sailed from 0900 to 0930. For that we use the formula: D is equal to S times T divided by 60, where D is the distance in nautical miles, S is the boat speed, and T is the time in minutes. In our case: 8 knots times 30 minutes divided by 60 equals 4 nautical miles. Using the dividers, we span a distance of 4 miles on the latitude scale which is closest to the course line, and which runs along the sides of the chart. We applied this span on our course, placing one leg of the dividers on the 0900 LOP intercepting the course and the other leg on the course line. Using the parallel ruler we transfer the 0900 LOP to the blue mark. As we notice, the two LOPs intercept at the point RF. This is our Running Fix position.
https://wn.com/25_Running_Fix_Plotting
Flat earth look at Ship routes
8:09

Flat earth look at Ship routes

  • Order:
  • Duration: 8:09
  • Updated: 24 Apr 2017
  • views: 26419
videos
Yes looks like sships dont like southern ocean seem to go nth then south The yatch map tells all
https://wn.com/Flat_Earth_Look_At_Ship_Routes
30   use of divider measuring distance 2
1:29

30 use of divider measuring distance 2

  • Order:
  • Duration: 1:29
  • Updated: 11 Apr 2014
  • views: 1572
videos
How do you measure a distance that is longer that the span of your dividers? Assume that you are sailing from point A to point B. The true course is 110°, and you want to know how many nautical miles it is from A to B. However, the distance to be measured is greater than the divider's span. Use the dividers and span a distance of 10 miles on the latitude scale which is closest to point A and B. Walk the dividers along the course as many times as needed until you get close to point B, and mark the last point as point X. In our case we need to walk the dividers three times. That makes 3 times 10 miles, equalling 30 miles. Now measure the distance from point X to point B and apply this span on the latitude scale which is closest to point B. On the scale you find that in this case the distance is 4 minutes or 4 nautical miles. So the distance from A to B is 34 nautical miles; 30 miles plus 4 miles.
https://wn.com/30_Use_Of_Divider_Measuring_Distance_2
How to find the bearing and distance a boat travels using trigonometry
10:23

How to find the bearing and distance a boat travels using trigonometry

  • Order:
  • Duration: 10:23
  • Updated: 09 Dec 2015
  • views: 4424
videos
http://www.freemathvideos.com In this video playlist you will learn how to graph the trigonometric functions for sine, cosine, tangent, cotangent, secant, and cosecant. You will learn how to identify the amplitude, period, phase shift, vertical, horizontal, translation, transformation, reflection, of the graph. Next we will explore the inverse of functions to find the angle when given a function.
https://wn.com/How_To_Find_The_Bearing_And_Distance_A_Boat_Travels_Using_Trigonometry
Sea Distance Calculator
1:47

Sea Distance Calculator

  • Order:
  • Duration: 1:47
  • Updated: 13 Apr 2015
  • views: 571
videos
Sea Distance Calculator, Port to Port Distances, Transit Times ... http://www.marinevesseltraffic.com/2013/07/distance-calculator.html
https://wn.com/Sea_Distance_Calculator
At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing no
5:14

At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing no

  • Order:
  • Duration: 5:14
  • Updated: 18 Dec 2015
  • views: 26155
videos
At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing north at 25 km/h. How fast is the distance between the ships changing at 4:00 PM?
https://wn.com/At_Noon,_Ship_A_Is_150_Km_West_Of_Ship_B._Ship_A_Is_Sailing_East_At_35_Km_H_And_Ship_B_Is_Sailing_No
How to find port to port distance
2:49

How to find port to port distance

  • Order:
  • Duration: 2:49
  • Updated: 23 Oct 2017
  • views: 18
videos
https://wn.com/How_To_Find_Port_To_Port_Distance
Calculating Distance with Latitude
3:01

Calculating Distance with Latitude

  • Order:
  • Duration: 3:01
  • Updated: 14 Oct 2015
  • views: 61655
videos
In this tutorial, Jennifer shows how you can use a location's latitude to determine how far north or south it is from another location. The same process can be used to calculate how far east or west a location is from another using longitude. One important reminder that is shown is how many minutes of latitude are in one degree of longitude.
https://wn.com/Calculating_Distance_With_Latitude
Navigation Basics - Reading a Nautical Chart - Kayaking Tips #48 - Kayak Hipster
6:47

Navigation Basics - Reading a Nautical Chart - Kayaking Tips #48 - Kayak Hipster

  • Order:
  • Duration: 6:47
  • Updated: 16 Nov 2016
  • views: 7369
videos
Some basics of navigation, I go through the following topics on how to read a nautical chart: - Depths - Buoys, RRR - Hazards - Latitude and Longitude - Distances - Compass Rose - Magnetic vs True North Kayak Hipster http://www.kayakhipster.com
https://wn.com/Navigation_Basics_Reading_A_Nautical_Chart_Kayaking_Tips_48_Kayak_Hipster
CRP-5: Distance conversions
25:52

CRP-5: Distance conversions

  • Order:
  • Duration: 25:52
  • Updated: 21 Feb 2016
  • views: 1380
videos
Part 2 of my CRP5 series, showing the way to use a CRP-5 to convert distances. The most useful conversions to know are: 1m = 3.28ft 1nm = 1,852m 1nm = 1.852km 1nm = 6,080ft 1nm = 1.15sm 1sm = 1,610m 1sm = 1.610km
https://wn.com/Crp_5_Distance_Conversions
36    fix position bearing and vertical sextant angle bearing and vertical sextant angle 1
1:43

36 fix position bearing and vertical sextant angle bearing and vertical sextant angle 1

  • Order:
  • Duration: 1:43
  • Updated: 11 Apr 2014
  • views: 20482
videos
A Fix can also be obtained by combining a compass bearing and a distance of the same lighthouse. You can determine the distance knowing the height and the vertical sextant angle of the lighthouse. Let's assume you sail near the coast and, looking on your nautical chart, you spot the lighthouse A. Among the characteristics of the lighthouse, you read that it has a charted height of 103 meters or 338 feet. This is the height above mean high water spring tide. After calculating the height of tide at that time, the corrected height of the lighthouse is 105 meters or 345 feet. Use the sextant and measure the vertical angle of the lighthouse. Let's assume, after applying the index error, that the vertical angle is 2 degrees and 30 minutes. Knowing the corrected height and the corrected vertical sextant angle of the lighthouse, calculate the distance, using the formula: D is equal to h times 0.565, divided by v, where D is the Distance in nautical miles, h is the Height of the Lighthouse in feet, and v is the Vertical sextant angle in minutes. In our case, 345 feet times 0.565 divided by 150 equals 1.3 nautical miles.
https://wn.com/36_Fix_Position_Bearing_And_Vertical_Sextant_Angle_Bearing_And_Vertical_Sextant_Angle_1
Great Circle Distance
13:37

Great Circle Distance

  • Order:
  • Duration: 13:37
  • Updated: 20 Apr 2013
  • views: 52715
videos
Calculate the distance between two cities.
https://wn.com/Great_Circle_Distance
How to measure distance on a chart
1:37

How to measure distance on a chart

  • Order:
  • Duration: 1:37
  • Updated: 27 Sep 2012
  • views: 4347
videos
This short 'how to' film by Stormforce Coaching's Principal, Doug Innes, demonstrates how to measure the distance between two points on a chart, using latitude. Doug explains how to use a latitude scale and a set of dividers to measure a distance, and how to equate minutes and miles.
https://wn.com/How_To_Measure_Distance_On_A_Chart
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