 # Does nautical mile change with altitude?

## Does nautical mile change with altitude?

at altitude is then off by 7/4000 or about 0.2%, not enough to make a difference. this error applies to any linear distance miles, km, or nmi. The best navigation charts in use were in nautical miles .

## Does a nautical mile varies with latitude?

A mile on land is equal to 5280 feet (1609.3 metres), while a sea or nautical mile is one-sixtieth of a degree of latitude, and varies from 6046 feet on the Equator, to 6092 feet at a latitude of 60°. …

Does nautical mile change?

Historically, it was defined as the meridian arc length corresponding to one minute (160 of a degree) of latitude. Today the international nautical mile is defined as exactly 1852 metres (6076 ft; 1.151 mi). The derived unit of speed is the knot, one nautical mile per hour….

Nautical mile
statute mile ≈1.151
cable 10

### How many nautical miles is 1 degree of latitude?

60 nautical miles
Approximate Metric Equivalents for Degrees. At the equator for longitude and for latitude anywhere, the following approximations are valid: 1° = 111 km (or 60 nautical miles)

### How to calculate the gradient per nautical mile?

This table provides a rate of climb or descent in feet per minute below the GROUNDSPEED IN KNOTS for the gradient shown in FEET PER NAUTICAL MILE at the left. Table accuracy is within one foot per nautical mile. This table is for use in climbs, descents from altitude and non-precision instrument approach procedures.

How are nautical miles divided by vertical velocity?

Flight levels divided by nautical miles equals gradient. Nautical miles per minute times descent angle times 100 gives vertical velocity in feet per minute. Start descent at three times your altitude to lose in thousands of feet to achieve a three degree gradient.

#### How is a nautical mile related to latitude?

One of the most important concepts in understanding the nautical mile though is its relation to latitude. Because a nautical mile is based on Earth’s circumference, an easy way to understand the calculation of a nautical mile is to imagine the Earth being cut in half. Once cut, the circle of the half can be divided into equal portions of 360°.

#### How many nautical miles per minute do you lose?

Nautical miles per minute times descent angle times 100 gives vertical velocity in feet per minute. Start descent at three times your altitude to lose in thousands of feet to achieve a three degree gradient. Start descent at four times your altitude to lose in thousands of feet to achieve a 2.5 degree gradient.