An interesting piece on hurricane velocity Note that a category 5 at minimum is twice the force of a category 3 at minimum. A category 3 at minimum is 2.2 times a category 1 at minimum. Since Irma’s velocity squared at its 185 mph maximum of 3.42 is twice the category 4 value of 1.69, […]

Electronic Assisted Analog Navigation circa 1981

Marine Sextant  Stop watch to capture time of sun/star shot   Most accurate timepiece available at a reasonable price   Radio shack time cube with preset frequency’s of 5, 10 and 15 megahertz  to receive continuous time signal essential to navigation. Here is a recording. Used in calculating the lines of position. How it was […]