Contents

- 1 How do you find the longitude and latitude of a chart?
- 2 What is longitude and latitude in aviation?
- 3 How do you find the ship position using latitude and longitude?
- 4 How do you find the distance on a Mercator chart?
- 5 How do you read lat and long?
- 6 Do pilots use coordinates?
- 7 Do pilots use GPS coordinates?
- 8 How do you read Graticules?
- 9 How is Merpass calculated?
- 10 How do you calculate longitude at sea?
- 11 How do you calculate long Chron?

## How do you find the longitude and latitude of a chart?

Locate Your “Position Box” Before You Plot! ( Illustration A above)

- Write down your GPS Latitude and Longitude into your log.
- Concentrate on illustration A.
- Locate the approximate latitude 41°17.0’N.
- Scan the top or bottom of your chart and find the approximate location of your Longitude 70°26.0’W.

## What is longitude and latitude in aviation?

Lines of latitude measure north-south position, with the equator at 0 degrees and the North Pole at 90 degrees North. Lines of longitude measure east-west position, with 0 degrees at Greenwich, England.

## How do you find the ship position using latitude and longitude?

When latitude and longitude lines are drawn on a map or globe, they form a grid. If a navigator knew both his latitudinal and longitudinal position on that grid, he could figure out precisely where his ship was positioned at sea. To find the ship’s latitude, sailors used a tool called a sextant.

## How do you find the distance on a Mercator chart?

Measuring Distance On a Mercator chart, the latitude scale on the sides of the chart serves as the distance scale. It’s worth remembering that only the vertical, latitude scale on a Mercator chart can be used to measure distance, not the horizontal longitude scale.

## How do you read lat and long?

Latitude and longitude are broken into degrees, minutes, seconds and directions, starting with latitude. For instance, an area with coordinates marked 41° 56′ 54.3732” N, 87° 39′ 19.2024” W would be read as 41 degrees, 56 minutes, 54.3732 seconds north; 87 degrees, 39 minutes, 19.2024 seconds west.

## Do pilots use coordinates?

Explanation: When flying above large oceans there are no land marks to,identify the location.. Navigating instruments will show the pilot the longitude and latitude. So pilot can know where he is now.

## Do pilots use GPS coordinates?

GPS. GPS is the most common and most accurate navigation system in use today. Today’s pilots use a combination of the above navigation techniques. Most commonly, a pilot in a modern aircraft today will use GPS, but there are some airports and routes that will require the use of VORs.

## How do you read Graticules?

Using the same calibrated eyepiece graticule to measure a cell: The width of the cell highlighted = 52 – 40 = 12 eyepiece graticule divisions. The real width of the cell is 12 × 4.9 μm = 59 μm (to two significant figures).

## How is Merpass calculated?

The long method involves calculating the time of meridian passage at the present position an hour or so before noon and then plotting a new DR position for that time. In this way, the time of meridian passage at the new DR position can then be calculated in advance.

## How do you calculate longitude at sea?

Time sight is a general method for determining longitude by celestial observations using a chronometer; these observations are reduced by solving the navigational triangle for meridian angle and require known values for altitude, latitude, and declination; the meridian angle is converted to local hour angle and

## How do you calculate long Chron?

Go to Sight Calculator and then to Long-by-Chron. Next enter all the input values that you have. And then click on “ Calculate ”. So with the morning sight, we have got one position line and we have the position through which to draw it (DR Latitude and observed longitude).