what happened to 'an illustrated version of the hunt'

[timberwolfdp]

...or whatever the thread was called. Someone did a great walkthrough of plotting intercepts, etc. I thought for sure it used to be in this forum.

If it's somewhere really obvious then wow... I'm blind! :(

[timberwolfdp]

NM FOUND IT!

I am truly not observant today.

[Dantenoc]

It seems to have lost it "sticky" status... perhaps it's popularity dropped among forum visitors? :-? ... or maybe it was becuase nobody had bothered to rate it?

[Drebbel]

I assume it dropped status because if no one would ever drop a sticky the whole front page would consist of nothing but stickies :D

[robj250]

Yes, I was lucky enough to down load both versions, the text & picture version and the pdf version. But I am really having problems with it. Some of you guys know that I have an incurable brain disease which most of the time makes it impossible for me to understand something that you guys have no problems with.

Now here is my problem. The "Hunt or whatever it is called" and the "Using Map Tools Revised" used examples using a large scale map. (which I have printed out in a binder) All my contacts (reported by radio) are either at a scale of 125 or 250 km. Therefore I have problems with steps 3, 4, 5, and 6.

Could someone out there give me a simple explanation on these steps which I find confusing. I really need the help 'cause I have to try to do it on a printed sheet, using calipers, ruler in mm, protractor, calculator, etc. Therefore after receiving a radio message regarding a "large convoy" I have to take a 'snap' of the screen showing both my sub and the convoy, print it out and then try to work out a solution.

Also, is there anyway to find out my sub's actual course.

I've been doing all these calculations ever since I started my 1st patrol and now I'm on my 42nd. That's a lot of work, phew.

[U-Bones]

Also, is there anyway to find out my sub's actual course.


From the Periscope or UZO:

- key (set view to heading)
= key (set heading to view)

You will get a verbal verification of your "new" heading.

You will now need to remind your navigator to return to course.

[Threadfin]

If you are using a mod that causes the map contacts to not have their directional 'tails' then this doesn't work. Otherwise it's really this simple. Put away all the tools and calculators.

Man I can't stand that I can't paste on this forum. How can I do it?

http://home.comcast.net/%7Edbond41/mt2.jpg


Here you see I get a contact. I take the course thing and make an intercept. The 'target leg' is drawn straight through the target's directional tail, that establishes the target's course. The 'intercept leg' is then drawn to intersect the target's course at a distance that assures we arrive ahead of the target. Rarely will any merchant be making more than 14 kts. So all you need to do is make each leg of the intercept roughly equal, or a little longer for the target leg, then go faster than the target. You'll arrive ahead every time (unless the target changes course, unlikely).

I may be wrong, but it seems in reading your posts that you desire to intercept the target at a right angle everytime. I say you should get to the target's course early, then travel down the reciprocal of the target's course and meet them head-on.

[robj250]

Thanks, but I never get a convoy at a 25km scale nav map. That's the probably scale that the description on using the tools was based on using a "single" target. All my convoys are mostly at a scale of 250 km, so naturally the steps I mentioned don't make sense to me. Sorry about that.

Don't get me wrong, it's a great tutoral. It's just of no use to me when my nav map is 250 km.

[Threadfin]

The method I just showed works at any scale.

[robj250]

Also, is there anyway to find out my sub's actual course.


From the Periscope or UZO:

- key (set view to heading)
= key (set heading to view)

You will get a verbal verification of your "new" heading.

You will now need to remind your navigator to return to course.

Thanks very much U Bones.

[robj250]

The method I just showed works at any scale.

Thanks Threafin. I understand that. I do it all the time on a printed out copy of the nav map on paper. My point was I don't understand or comprehend the steps I mentioned using the revised map tools instructions.

I appreciate your response.

[Dantenoc]

I don't understand what the problem is... the method works regardless of scale... ALL trigonometry principles work regardless of scale... the very core of the method is that scale DOES NOT matter... that's why drawing the small triangle gives you the solution for the big triangle (figuring out the inner angles on the small one gives you the inner angles of the big one)

As a matter of fact, precisely because scale does not matter you are completely free to choose whatever scale you want, as long as you stick with it once chosen. Using 1km to represent one knot of speed when drawing the "small" triangle gives you a triangle that is too small for your comfort? well, then change your scale choice and use 10km for every knot of speed. Or maybe it's the other way around, the target is so close that using the 1km to 1knot scale makes your "small" triangle actually bigger than the "big" triangle? then use a smalle scale, such as 0.1km to 1knot scale. Use whatever scale fits best

a quote from the original thread:
"You measure a distance that is representative of his speed. In this case, he was reported as slow, which you know means about 6 knots (medium is 9). In this case the image shows a distance of 60 kms on the ruler which works well. Other options would have been 6 kms, or 0.6 kms or whatever number that readily reminds you of 6 knots."

See?... heck, you can even go crazy and use weird scales such as "3.14159 kms represent 1 knot of speed in my drawing" just so that your triangles come out looking pretty, no?

Or maybe the confusion is about something else... I'd like to help but I really don't understand what the problem is :hmm: