12-29-2020, 11:47 AM
(This post was last modified: 12-29-2020, 11:52 AM by P.Rutherford.)
That is a good method but between the time the line pays out and goes taught could be a lot.
I was reading in a book, don't remember the title, but in the 1500's aboard ships certain crew members were designated as the hour glass turners- they turned the sand hour glass over and said various prayers at that moment.
Plenty are the mariners and navigators upon the advent of Loran or GPS let their sextants become dusty...and for good reasons too- time in shipping is money.
Not to disregard your method but here's one I've used extensively to calculate boat speed. It can be used, loosely, to determine time. The file's attached.
Paul
I was reading in a book, don't remember the title, but in the 1500's aboard ships certain crew members were designated as the hour glass turners- they turned the sand hour glass over and said various prayers at that moment.
Plenty are the mariners and navigators upon the advent of Loran or GPS let their sextants become dusty...and for good reasons too- time in shipping is money.
Not to disregard your method but here's one I've used extensively to calculate boat speed. It can be used, loosely, to determine time. The file's attached.
Paul