Radar Solution Calculator for Interceptions (CPA)

Pilot_76 · 11-30-11, 12:08 AM

http://www.marinermath.com/Radar-Solution.php

Rockin Robbins · 11-30-11, 09:34 AM

That'll work! It's a relative position calculator, needing your course and speed plus two range and bearing observations of the target. It figures out the target heading by using relative bearing plus your own course. Note that you would have to maintain the same course and heading between target fixes, so they really didn't have to get you to enter your course three separate times, but that is a minor annoyance.

As a technical point, on the top section it asks for the own ship course and on the bottom two it asks for heading. In some situations, like in a cross-current your heading will be different than your course and that could be why they did it that way. It wouldn't apply in SH4.

Pilot_76 · 11-30-11, 07:19 PM

Yes. At least it also gives a brief explanation as well. Good to learn the basics. I'm still in my first patrol (Finally started one) and this might come in hand.

irish1958 · 12-01-11, 08:58 AM

Thanks for this tool. I plan on using it on my next patrol.
Your navigation tool also looks interesting.

Pilot_76 · 12-01-11, 11:28 AM

Quote:

Originally Posted by irish1958

Thanks for this tool. I plan on using it on my next patrol.
Your navigation tool also looks interesting.

If you happen to know how to save that and use it offline let me know

Which nav tool?

razark · 12-01-11, 03:02 PM

Quote:

Originally Posted by Pilot_76

If you happen to know how to save that and use it offline let me know

Here ya go:
Part 1
Part 2

11-30-11, 12:08 AM	#1
Pilot_76 Chief Join Date: Mar 2010 Location: São Paulo, Brazil Posts: 321 Downloads: 462 Uploads: 0	Radar Solution Calculator for Interceptions (CPA) http://www.marinermath.com/Radar-Solution.php

11-30-11, 09:34 AM	#2
Rockin Robbins Navy Seal Join Date: Mar 2007 Location: DeLand, FL Posts: 8,900 Downloads: 135 Uploads: 52	That'll work! It's a relative position calculator, needing your course and speed plus two range and bearing observations of the target. It figures out the target heading by using relative bearing plus your own course. Note that you would have to maintain the same course and heading between target fixes, so they really didn't have to get you to enter your course three separate times, but that is a minor annoyance. As a technical point, on the top section it asks for the own ship course and on the bottom two it asks for heading. In some situations, like in a cross-current your heading will be different than your course and that could be why they did it that way. It wouldn't apply in SH4. __________________ Sub Skipper's Bag of Tricks, Slightly Subnuclear Mk 14 & Cutie, Slightly Subnuclear Deck Gun, EZPlot 2.0, TMOPlot, TMOKeys, SH4CMS

12-01-11, 08:58 AM	#4
irish1958 Ocean Warrior Join Date: Apr 2005 Location: Carmel, Indiana Posts: 3,250 Downloads: 320 Uploads: 11	tool Thanks for this tool. I plan on using it on my next patrol. Your navigation tool also looks interesting. __________________ Irish1958

11-30-11, 07:19 PM	#3
Pilot_76 Chief Join Date: Mar 2010 Location: São Paulo, Brazil Posts: 321 Downloads: 462 Uploads: 0	Yes. At least it also gives a brief explanation as well. Good to learn the basics. I'm still in my first patrol (Finally started one) and this might come in hand.