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.

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.

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

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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.

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

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.