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Linton
10-15-2006, 06:19 AM
This was invented by a USN officer and it gives a time to go deep for a variety of threats.Has anybody thought about making one?
Kapitan
10-22-2006, 06:52 AM
Iit would be a good tool for me as well :D
Linton
02-03-2008, 12:20 PM
Here is the link to it:
http://www.navy.mil/navydata/cno/n87/usw/issue_15/ekelund.html

http://www.navy.mil/navydata/cno/n87/usw/issue_15/images/spearsw.gif
Kapitan
02-04-2008, 02:04 AM
Wonder if you could download your own hmmm.... or even make one .....
Linton
02-04-2008, 04:43 AM
The original was home made so it is very possible.All that is needed is the image to be enlarged and sharpened.Over to the forum members.
Transients
02-16-2008, 03:20 AM
Like all the best inventions, it's simple. (I bet that's what the guy who invented the wheel said!) It costs almost nothing to make. In a way that's a shame because then Lt. Spears could go into business producing them and make a fortune!:cool: I hope he's applied for a patent.

I bet those PCO's did well.
Pisces
04-13-2010, 12:55 PM
Anybody have an idea what the formula is behind those scales? It's not the first sliderule I made. ;) (http://www.subsim.com/radioroom/showthread.php?t=147719) Judging by the crude drawing it must be easy. If I figure out how it's calculating.

[EDIT] Whoops, necromancing here. Nevermind me. :o