Birthday

I turned 60 today. I had a great birthday. First I went out to lunch with Fran, Alicia and Jackson. Then I got my hair cut and got a senior discount because I was 60. Next I had cake that Fran and Jackson made.

20140509-130147.jpg
Finally, Fran and I went out for dinner to Chillfire Grill and had a great meal.

Location Distance Bearing Calculator

After creating the Distance Time Speed calculator I thought about creating a calculator for finding distance and bearing from two locations, or a second location from a location, distance and bearing. While investigating how to do this I discovered how to get a current location so I integrated this in the tool as well.

I also added the abilities to convert between three formats of latitude/longitude and to pass a distance to the  Distance Time Speed calculator.

Here is a screen shot of the tool on an iPad.

Location Distance Bearing
Location Distance Bearing

To use this tool you enter a location as a latitude/longitude pair.  You can enter a location manually, or get your current location, if supported by the device.  In this example, I get my current location by pressing “Set Current Location” (press it 2 or 3 times for the best accuracy).

Current Location
Current Location

It found my current location, with an accuracy of 16 feet.  Next, I enter Location 2 in the format “dd mm ss” for a latitude of 35° 35′ 32″ N and a longitude of 081° 02′ 13.6″ W. The tool accepts latitude and longitude in several different formats. This lets you copy and paste from other tools, such a Google Earth.

Location 2
Location 2

When I press “Submit” I get the distance (in nautical miles and feet) and the bearing (in true degrees).

Distance and Bearing
Distance and Bearing

The distance is 1.436 nautical miles, or 8722 feet, and the bearing is 145 degrees true.

There are three formats for displaying latitude and longitude. (The tool will keep the original precision independent of the display format chosen.) If I want to see my locations in a different format, I can use the tool to convert between formats. In this example I want to convert from degrees minutes to degrees minutes seconds. I press the “Format” button and select “dd mm ss”.

Change Format
Change Format

When I press “Submit” the format will change.

Degrees Minutes Seconds
Degrees Minutes Seconds

If I want to calculate the speed to get from Location 1 to Location 2 in 21 minutes, I can send the distance to the Distance Time Speed tool by pressing “Send to Dist Time Speed Calculator”.

Send to Distance Speed Time Calculator
Send to Distance Speed Time Calculator

Then I enter 21 minutes.

Calculate Speed for 21 Minutes
Calculate Speed for 21 Minutes

When I press “Submit”…

Speed Calculated
Speed Calculated

I see that my speed is 4.1 knots, or 4.7 mph.

In the next example I calculate where I will be if I travel from my current location for 1.42 nautical miles at a bearing of 43 degrees true.

Calculate Location
Calculate Location

When I press “Submit” I will see the latitude and longitude of my location.

Location Calculation
Location Calculation

The formulas used by this tool are not 100% accurate so you may see some difference if you calculate a distance and bearing and the use the results with Location 1 to calculate Location 2.

Another feature of the tool is the “Swap” button. This will swap Locations 1 and 2. You can use this feature to calculate the distance and bearing traveled between two locations. For example, press “Set Current Location” as you start of your trip. (You  may better accuracy if you press it 2 or 3 times.) When you finish your trip press “Swap”, “Set Current Location” (2 or 3 times) and “Submit” to see distance and bearing traveled.

I learned a lot developing this tool and I think that I came up with something useful.  At least I think it will be useful. Hopefully you will too.

Happy Easter

Fran and I are still in Charlotte, waiting for our next grandchild. We didn’t plan things this way, but it is nice  to spend Easter with some family. The Easter Bunny came and Jackson got a T-Ball set, an airplane and lots of candy.

We had a huge spiral ham for dinner. Looks like we will be having left-overs for the next few days. But that’s  okay because we have stuff to make bean soup.

It was raining this morning, so we hid eggs inside, but it cleared up and we went outside later.

It was a great day and we were happy to spend it with some family.

 

Distance-Time-Speed Calculator

When we are cruising on Questeria, we are always doing distance, time, speed calculations. Traveling on the Intra-Coastal Waterway, ICW, complicates it even more if we need to convert between nautical miles and statute miles. It’s not hard to do all this when you are sitting at a desk with pencil, paper and calculator handy, but it becomes more challenging when steering a boat.

I had some extra time, so I decided to write a web utility do this. Here is a screen shot of the utility on an iPhone 5.

iPhone Screen Shot
iPhone Screen Shot

You can convert between nautical miles and statute miles or knots and mph and you can calculate distance, time or speed by entering two values.

For example, if I am cruising up the ICW, look at my ICW guide and see that the next bridge that I need opened is 8.7 statute miles away, and I look at my GPS and see that I am doing 5.2 knots, I enter 8.7 into the Statute Miles field and 5.2 into the Knots field.

Statute Miles and Knots
Statute Miles and Knots

Then I press “Submit” to see how long it will take.

Time Calculation
Time Calculation

It shows me that it will take me one hour, 27 minutes and 14 seconds. It also tells me that 8.7 statute miles is equal to 7.56 nautical miles and that 5.2 knots is equal to 6.0 mph.

The values in the fields will stay until overwritten or cleared by pressing “Reset”. So say that after 4 nautical miles, I am still doing 5.2 knots, and I want to see how much time is remaining to get to the bridge. I need only change the “Nautical Miles” and clear out the time.

Second Time Calculation

Then I press “Submit” to see the new time.

New Time Calculation
New Time Calculation

I see that I have 41 minutes and five seconds to get there. It also tells me that 3.560 nautical miles is equal to 4.097 statute miles.

This tool is on my website, under Tools for Cruisers, then Distance Time Speed. You can use it on any device, with a web browser, that is connected to the internet. Sorry. There is no off-line version at this time. I hope you find this useful. Stay tuned for a post on the Location Distance Bearing tool, which can work with the Distance Time Speed tool.

In Charlotte, NC

I’m in North Carolina, but Questeria is in North Florida. On Monday we got a call from Alicia, and Fran got a flight to Charlotte. On Tuesday I got a rental car. On Wednesday I drove to Marathon, FL. On Thursday I drove back to the boat in North FL, and today I drove to Alicia’s.

Everybody is fine and we will wait here until the baby is born.

Welcome

I installed WordPress on my website and I am trying this format. I will leave Journals 1-6 in their current format and use WordPress for new blogs/journals.

I will try to make these entries more casual and include more than just cruising. I will use “categories” to mark my posts so readers can choose just to look at cruising posts.