SmithDoor's latest activity

Yes, if you are on land and your observations are correct and your time is correct and your charts are accurate and you have a good...

When I was going into mountains . I take a CB and 35 feet of wire great long range. I do a compass too. If going on water I take...

Starrett. Machinist Level Sensitivity 0.005 in./ft., in degrees 0.0167 or 0.1" minutes or 6 seconds Source...

Calculation 1 Earth circumference(1/1) 24,900. ÷ Time in hours (1/2) 24. = (1/3) 1,037.5 ÷ Time in minutes (1/4) 60. = (1/5)...

Interesting 1/2 mile that is 2,640. Feet. That is within 20 seconds by hand stabilizing only. I wonder if ever use a gyro...

Both sextant and transit advertised accurate degree is 69.4 miles One minute is 1.6 miles 20 second is 0.386 mile or 2,037 feet. The...

Thank you Dave

Happy Birthday! and, life is more mysterious to me every day.

Lots of wisdom here... Thanks Green Door, until I read your posts I was one who spent 45 years as an Engineer without "using the...

I have ask of license Engineers if ever used Calculus and they all had same answer never used Calculus.Thank God for not needing...

It could be it not used more is most time it takes a lot time to do one calculation. Then they look for a formula that more or less...

I have made a lot one patterns. If broken part I use molding clay the in schools . The make the mold . Where clay was use I machine...

Just think of navigating on the open ocean and making maps for others to use in the 1500's just the equipment list below .Global and...

Gyro compass and magnetic compass onboard sounds like aircraft. Glad to here they a sextant. I can see why calculators are noon. I...

I hear a lot of folks say "I never used calculus after college", but if you work as an engineer, then you use the knowledge constantly...