Dead Reckoning Calculator

Calculate ocean current set and drift by comparing your DR position to an actual fix.

Last reviewed: April 2026
Built and maintained by · Last updated April 2026

DR Position (Where You Expected to Be)

nm
nm

Fix Position (Where You Actually Are)

nm
nm
hours
Set (Current Direction)
062°T
Direction the current is flowing toward (degrees true)
Drift Speed
0.86 kn
Total Displacement
1.71 nm
Current Vector
Current setting 062°T at 0.86 knots
Important Disclaimer: The information provided by this calculator is for educational purposes only. It isn't intended to replace professional advice or expertise. Always consult with a qualified expert before making any critical decisions related to survival planning.

About the Dead Reckoning Calculator

The Dead Reckoning Calculator is a powerful tool for survival planning, offering a wide range of calculations that can help individuals prepare for unexpected situations. From calculating the survival time of a person in a wilderness scenario to estimating the cost of building a shelter, this calculator can provide crucial information that can be lifesaving.

Understanding Dead Reckoning

Dead reckoning is a method of navigation that uses the known position, course, speed, and time to estimate the current position. In survival planning, this method can be used to estimate the amount of food, water, and other resources a person will need over a period of time. For example, by knowing the rate at which a person consumes water and the amount of water available, the calculator can estimate how long the person can survive without additional water.

Real-World Applications

The Dead Reckoning Calculator has a wide range of real-world applications. For example, if a person is stranded in a wilderness area, they can use the calculator to estimate how long they can survive based on their current resources and the weather conditions. This information can help them make informed decisions about how to allocate their resources and how to seek help if necessary.

Common Mistakes

One common mistake when using the Dead Reckoning Calculator isn't accounting for all variables. For example, if a person is stranded in a desert, they may not consider the availability of food and water in the surrounding area. This can lead to an underestimation of the amount of resources they will need. Another common mistake isn't taking into account the weather conditions. For example, if a person is stranded in a snowy area, they may not consider the additional resources they will need to survive the cold weather.

Examples

Here are a few examples of how the Dead Reckoning Calculator can be used in a survival scenario:

Example 1: Estimating Survival Time

A hiker is stranded in a wilderness area and has limited resources. Using the Dead Reckoning Calculator, they can estimate how long they can survive based on the amount of water and food they have, as well as the weather conditions. For example, if the hiker has 1 gallon of water and 10 pounds of food, and the weather is mild, the calculator may estimate that the hiker can survive for 10 days. If the weather is harsh, the calculator may estimate that the hiker can survive for only 5 days.

Example 2: Estimating Cost of Building a Shelter

A person is planning to build a shelter for themselves and their family. Using the Dead Reckoning Calculator, they can estimate the cost of building the shelter based on the materials and labor required. For example, if the person needs 100 square feet of lumber, 100 square feet of roofing material, and 100 square feet of insulation, and the cost of these materials is $10 per square foot, the calculator may estimate that the total cost of building the shelter is $3,000.

Example 3: Estimating Cost of Water and Food

A person is planning a trip to a remote location and needs to estimate the cost of water and food for the trip. Using the Dead Reckoning Calculator, they can estimate the cost of water and food based on the amount they will need and the cost of these items. For example, if the person needs 2 gallons of water and 10 pounds of food for the trip, and the cost of water is $2 per gallon and the cost of food is $1 per pound, the calculator may estimate that the total cost of water and food is $30.

What Happens If

What happens if a person doesn't account for all variables when using the Dead Reckoning Calculator? For example, if a person is stranded in a wilderness area and doesn't consider the availability of food and water in the surrounding area, they may not have enough resources to survive. This can lead to dehydration, starvation, or even death. What happens if a person takes into account the weather conditions when using the Dead Reckoning Calculator? For example, if a person is stranded in a snowy area and takes into account the additional resources they will need to survive the cold weather, they may have enough resources to survive. This can help them stay warm and avoid hypothermia.

Frequently Asked Questions

The Dead Reckoning Calculator is a tool for survival planning that offers a wide range of calculations that can help individuals prepare for unexpected situations.
The Dead Reckoning Calculator has a wide range of real-world applications, including estimating survival time, estimating the cost of building a shelter, and estimating the cost of water and food.
One common mistake when using the Dead Reckoning Calculator isn't accounting for all variables. Another common mistake isn't taking into account the weather conditions.
If a person doesn't account for all variables when using the Dead Reckoning Calculator, they may not have enough resources to survive, which can lead to dehydration, starvation, or even death.
If a person takes into account the weather conditions when using the Dead Reckoning Calculator, they may have enough resources to survive, which can help them stay warm and avoid hypothermia.