No Map No Problem Part 4 Judging Longer Distances

www.thepathfinderstore.com
Dave Canterbury, David Canterbury, The Pathfinder School,Bush Craft ,Survival skills, Historical Lore, Primitive Skills, Archery, Hunting, Trapping, Fishing, Navigation, Knives, Axes, Fire, Water, Shelter, Search and Rescue

[@StardidiMarcelis]

I had thought of all kinds of uses for math, but bushcraft never crossed my mind. Great information Dave!

[@gaijinbonsai3975]

Best video of the series yet. You just keep giving better and more useful information in each episode. You started off with the basics we should all know and now in the last two we are really getting into the meat of navigation. Thank you.

[@ssbfmcw]

Another practical lesson presented in an easy to follow style. The Alpin Compass sold in the SelfReliance Store, has a TAN table printed on it's cover (labeled as % gradient). Percent grade is TAN X 100 so for example, at 45 degrees, % gradient is listed as 100. To convert to Tan, simply divide 100 by 100 to find that the tan of 45 degrees is 1. Another example, for 20 degrees, % gradient is given as 36. Divide 36 by 100 to find the tan of 20 degrees is 0.36

[@ericwright7643]

I said it on the last video but, I will say it again. I really enjoy this series. Lots of useful info that I have not seen on any other "bushcraft" channel. Thanks! I can't wait for the weekend to go out and practice.

[@HughBLongAuthor]

Dave, I've loved this series! Best vids yet. I really appreciate all you do for the self-reliance community. Thanks for sharing your wealth of knowledge.

[@1990westfalia]

Thank you Professor Canterbury. Great video, nice information, a cool tool to have in the tool box when out in the woods. I enjoy these series of topic driven video. Cast Iron Kid

[@rynohart7214]

OK now its time for me to add a note book to my kit. Another quality vid Dave, Thanks from AUSTRALIA!

[@craigmoore4060]

Really enjoyed this series! I'm not so good at geometry and algebra but you explained it so well that I understand! Thanks so much for taking the time.

[@RDM-fc6rd]

Helpful in so many ways, thanks Dave.

[@robertlundquist5450]

Another great video. Easy to understand and use. I passed the link on to our math teacher to show in his trig class for a real world use for what they are learning.

[@brucewayne-cave]

Thanks Dave for the valuable information.

[@DavidJelsmaBanjo]

Hey Dave. Was reading through some of the replies on here and well.... I've decided that most people don't leave comments to be helpful but only to be rude. I know and hope you know that your most loyal audience are rarely the ones on here that nit-pic. I do understand if they correct something you said in the video that was off and I'm sure you are also glad they do but the others are just a nuisance. You are the one spending days and nights in the woods trying to pass on the tribal knowledge in the freezing weather. Your teachings are not common knowledge and I thank you as well as do thousands of other people for what you do for us all. Just overlook any haters. If they weren't hating you they would be hating someone else. You are the Bomb! Thanks Dave Dave

[@MrRufusjax]

Wow. You just taught me more trigonometry than I ever learned in high school. It all makes sense now. You should get a part time job as a high school teacher. Great video.

[@jeffreyallanmiller2646]

Thanks for your videos, Dave.

[@themoodybobby1]

Dave something else you could add to this series is using a long pole in nav i think its called a Swedish pole compass but something i was taught as a kid for staying on a straight line through the bushes

[@ArtisanTony]

Cool! Trig and buschcraft! :)

[@garygerow4822]

Thanks again Dave.GodBless.

[@davehoward6573]

hi Dave hope you are well. Very useful information as always, thanks very much for sharing. all the best, Dave H.

[@eric.st-laurent]

I would recommend looking into the pocket book "Pocket Ref" by Thomas J. Glover. It contains the trigonometry tables, but also the related formulas nicely presented. It's pretty pocketable and contains other info relevant to survival such as first aid, knots, weather, mapping, calendar, etc. In a last resort you can use the book as tinder ;)

[@BManHunts]

Once again, Dave, great info.

[@MidasMind]

Watching this series, I've come to understand how useful a compass really is. Much appreciated.

[@RDM-fc6rd]

So helpful, in many ways. Thanks for sharing you knowledge.

[@wjf213]

This is GREAT info and I can see it very useful for long wide open areas like a desert or something when you're wondering should I stay or should I go with the water I have on hand or whatever. You know what I mean. All your videos are great, but these last four videos have been GREAT.

[@fisherman2359]

god bless you dave and your family and may the new year bring more happieness to everyone around you.

[@FacetsOfTruth]

This is great knowledge to have. Thanks for teaching it Dave. Wonderful stuff.

[@alexnorton]

I really appreciate you taking the time to make these videos. The explanations are excellent and very clear. Thank you :)

[@MartinGoblet]

Superb explanations and a very good sample for mathemtics applications. Many thanks.

[@JRRoylance]

Thank you again Dave I love the way you explain these things to us

[@GrantButler]

Thanks for answering my question today. Those are some good examples that I didn't think of. Thank you!

[@EatCarbs]

Great stuff.. thanks for the video Dave

[@billwolfram412]

Thanks Dave !!! Great information !!

[@rrydlo]

Great series!

[@DireStraitsInImpala]

This really did make me take out my notebook! Great video, Dave!

[@DavidCanterbury]

No Map No Problem Part 3 Height and Distance

[@dougallen7890]

You have been going through my curriculum. Thanks Dave

[@DavidCanterbury]

?

[@dougallen7890]

Curriculum from college, wildlife and forestry. Map reading, map making, orienteering, etc. Even stereoscope use on aerial photos

[@tomwilson7202]

This reminds me of when I was a very young man and working as a rodman on a survey crew. This is most excellent,Dave! Thanks a ton!!! :)

[@tomwilson7202]

Just heard the weather update...Central Indiana is expecting 6"-12" of snow starting late Saturday through Sunday and the coldest temperatures in 20 years (-15 degrees) following that. I know though that the good LORD and your well learned skills will keep you well. Semper Vigilans :)

[@SoWe1]

as I have written on the last video, the explanation at 5:10 is wrong just making sure there is _one_ 45° angle does not make the triangle necessarily equilateral. You also have to make sure you have the 90° angle independently of your 45° angle.

[@congamike1]

That answers my question! Thanks!

[@cm2acres]

I followed you all the way, a bit to close on the first example which I got confused because you did not just divide 71.4 by 63 to get 1.13 and then multiply by 100 to get 113 meters BUT you did on the second example and it all came together. Thank you for the math lesson! This will be added to my write in the rain note book with the Tan Table

[@HaroldDGlez]

👏👏👏 👏 thank you sir. This videos are awesome!!!

[@RandomStuff-yr8yt]

More of this stuff. I think it's fascinating. Thanks Dave. Peace

[@mimitheninja3001]

Thanks for this series and all your other videos Dave :) Next time someone complains in math class about the material not applying to real life, I might just bring this up :) I never knew going out to the woods could involve so much math! I will certainly try these skills out someday :)

[@ChuckRichardsHandmadeKnives]

Excellent

[@Simplemansnature]

Ohhhh Snap... Math! Note to self: Replay video numerous times until the Greek turns into English! Lol! Just kidding Dave. That was an excellent lesson bro. BTW, I got the Pathfinder Condor Axe for Christmas! Love It! I am about to put my fourth coat of boiled linseed oil on it.

[@boogietaveras92]

Brilliant!

[@DavidJelsmaBanjo]

Im gonna need to think about this one for a bit. My math is a bit rusty. Thank you Dave

[@CigaretteTricks]

such useful information. take notes, everyone.

[@iliveoutside]

I think I will stick with my rangefinder for hunting, but judging longer distances over terrain is a very useful skill for sure.

[@timberrunner4956]

very informative as usual. and here i thought i would never use that stuff after school

[@Scott-K7sce]

the triangle in the beginning reminds me of a^+b^=c^ ;) thats the first thing came to mind . another great vid dave very informative

[@bigfootbushcraft7063]

Dave Canterbury + Einstein = holy freakin crap, who needs a map. Lol I got smoke coming from my ears. Now thats what I call a friction fire. Haaaaaa

[@dofishbuster]

LOL Geometry for the outdoorsman. One wonders if a teacher taught it this way using outdoor examples when I was in school if more of the guys would have paid attention. I guarantee buck on a ridge and gauging distance would have had them.

[@dannyswitch13]

i LOVE how simple you made this sound- wish i had you teaching my trigonometry class when i was back in school (oh life was so simple back then, aside from trigonometry haha). one question though, and anybody reading this who has the answers or an intelligent guess, is welcome to come throw in their ten pence, i'm not sure if you explain this in other video's and i will have a look and see if you do, but if not, please could you tell me how to complicate this value for 3 dimensions? (i.e, you just finish climbing a hillside, come to a sheer cliff face and want to see how far the trees/ town/ river etc in the distance are/ is, because obviously just doubling your final total wont be as accurate (especially if its hills all the way and the cliff your up is 2/300 meters up aswell, so do you have a formula for that kind of scenario? would really appreciate the info or a quick way of simplifying the math. And i'm interested to know, what would you do if you didn't have a score card for TAN etc, is there a way of knowing the values? I can just imagine its not something you would keep on your immediate person, so if you lose your pack down a river or even use it as tinder to start a fire to dry out after such a disaster, you would be kind of stuck if there is no alternative to having the scores written down. (now im sat thinking if making it a tattoo along with other tips for bushcraft into a leg sleeve would be pretty cool, like an instant manual if you ever find yourself naked in the woods after a heavy stag do lol.) Also just while i'm on this train of thought, at any point what is the distance of the horizon from where you are stood (i.e. the maximum it can be because of the Earth's curvature? I get hills etc also come into play with this, but for simplicity i'm just talking flat ground here. Thanks, keep up the good work, i can only wish that one day i'll be able to come see the pathfinder set up and spend some time in the area's you run about in, the UK is probably the worst location in the world for a bushcraft/ woodcraft/ camping in general enthusiast in my book, and the missus wont let me move away which sucks. take it easy and keep finding new paths :-)

[@daytonrobbins3361]

One thing I've done is on my Tan tables is use a little different method. I multiply instead of divide because it's much easier. For instance if I walk 100 paces and angle is 3 degrees I take 100 X the tan of 87. It's the same as saying 100 divided by the tan of 3. 1=89, 2=88, 3=87 and so forth. I find my multiplying instead of dividing it's much easier.

[@TheDutchPhysicist]

this is called parallax, it is also used in astronomy to measure/calculate the distance of stars.

[@stephanechenier230]

Hi dave awsome tips over and over about new skills,,great fan of you dave I would like to be with you and your familly in the end time, I have lots of stuff cause when the time come ,am not just going 72 hrs,in the wilderness if you know what I means ,,so my question with a good back pack ,,I have being thinking having a lot of weight on ur back and all,,would a hochey shoulder pad would help having less strain and pain,and soreness just to carry and travel further thanks RAM.

[@DireStraitsInImpala]

I tried to put this to the test on a map and I couldn't get this method work. I didn't find out what did I do wrong, but every time the distance to object was many times longer than it needed to be. But I think a simpler method would be, as "DenmanShooter" mentioned to use the right traingle. I didn't quite get why Dave replied to him about a 45 degree angle, as any angle can be used, just like in Dave's method. Only what I would suggest is, combine these two methods. Basically, have two right triangles, just like Dave showed and simply use the tanα=opposite/adjacent on BOTH of the right triangles. Then just multiply the results and divide by 2 to get an average result, which should be pretty close to actual.

[@canesser1]

Fantastic lessons! Waking up the squeaky mathematical mind Dave, great stuff in the practical world. I would have sat up and listened in class a lot better if they would have applied the math to the real world.

[@stephanechenier230]

Hi dave awsome tips over and over great fan question for you ,would a hockey shoulder pad,would be to have ,having less strain on back,shoulder less aching,pain,soreness,to travel further.would like to hear or see video .thanks ram

[@longhunterslegacy7240]

I'm lost, but thanks for the info.

[@survivewithout]

I had to watch this 4 times before I thought I had it. thank you for doing this series. im very weak when it comes to using a compass. were I live we just head in one direction until we hit a fence and take it to the road or hit a road first. the whole state is a mile by mile grid of roads but I do need to learn more because when I hike in other states. where do I find the tangents or TAN at? I didn't understand that part

[@verysurvival]

www.grc.nasa.gov/WWW/k-12/airplane/tabltan.html

[@survivewithout]

TheBognordave thank you so much

[@RWM0000]

Just wondering why you choose to work with metric instead of imperial? Great videos by the way . I have learned a great deal by watching your work.

[@spiderbreaker]

Hey Dave, Chris is doing a show on around the cabin on Friday, so could you join him to double the information, and so we can directly ask you questions on this info? thanks, Jon P.S. If you people didn't know, Around the cabin is a real time interview with Dave and other guests through Skype. Check it out, there is a lot of good info on there. and, you can type in questions for Hosts in the chatroom, and get a direct response. again, that's Aroundthecabin.com

[@andylundberg2932]

I know I should have paid attention in school, dangit!

[@DenmanShooter]

You really only need one pace count and one angle if you have a tangent table as long as your pacing made a right triangle. Distance = pacecount x tan(angle)

[@DavidCanterbury]

You can get away with that if you have one 45 degree angle offset but it will be less accurate especially at distance. For a river crossing as I said in the last vid one is enough for sure as long as you can get 45 degrees to get the right triangle- JMHO

[@WA8QFE]

Dave, We need Math teachers in Indianapolis... Lee Thompson

[@steffanoswald7917]

Is it okay to round up or down while doing the division since it’s average distance when we’re talking about far away objects?

[@themoodybobby1]

trig ahhhhhhh i get headaches from it.

[@jakeells66]

hey Dave, I was watching your longhunter videos again and I got curious. I you could go back to any time frame and live. A time frame of about, 60-70 years, what would it be?

[@joelreadman2534]

Dave, what do you use for a notebook?

[@Echo4PapaBravo]

You have to be very careful using straight line distances when you are traveling over uneven terrain; box canyons, uncrossable stretches of water, vertical cliffs, etc. all make using straight line distances pointless, and even dangerous, for navigation on uneven terrain. You see that something is only 1-2 clicks (km) out and decide to try to make it before it gets dark in a couple hours. You say to yourself, "who can't walk less than 2000m in 2-3 hours?" But if the terrain is not cooperative you could end up trying to bypass an obstacle, going off track, and getting stuck in some gully when night falls. And light fails faster when there is terrain or tall flora blocking the horizon. This is how people get lost and begin to panic. When they panic they try to make it just a little further, because they know it was only 2km at most. It has to be just over that hill right up there. They get injured in the failing light, with no camp set or resources collected. And so begins an actual survival scenario. Semper Fi

[@DavidCanterbury]

As I said over estimate and common sense dictates, If I have been walking this terrain already I can be fairly certain of terrain changes in the area, although there is always the unexpected but panic is always a killer no matter how much you know-

[@buddylight2191]

Cool stuff I just wish I was 40 years younger.

[@TheDutchPhysicist]

tan 86 = 14.30 tan 85 = 11.43 watch out at readings close to 90 (85 - 90) and 0 (0-5) these small angles can make your distance become much bigger or smaller than what they are a small miscalculation

[@TheDutchPhysicist]

for only a small miscalculation *

[@TheDutchPhysicist]

so the firetower is actually 1294 meters away, one number misreading, 262 meter difference in the answer.

[@DavidCanterbury]

Yeah we have already been through this brother, I was not wearing my glasses and made a mistake in this case 262 meters not much of a difference in walking distance-

[@Odin1978]

Basic trigonometry :)

[@nerblebun]

I've found a much easier way to determine the exact height of a tree. I just wait for the next ice or wind storm. After the storm, when the tree is firmly resting on the roof of my house, I use a tape measure. This method has worked perfectly the last six times.

[@DireStraitsInImpala]

Haha, that's crazy! But you know, the next time you build/buy a house, use Dave's method to see if any tree is long enough to fall on the roof!

[@nerblebun]

DireStraitsInImpala There will be no "next time" for a house. This is it. All I have to do, if I live long enough, is wait for all the several dozen trees within range of my house to fall. lol

[@judobeer]

Very helpful video! however, tan 86 degrees = 14.3 :)

[@DavidCanterbury]

Correct I didn't have my glasses on when looking at the Tan Table the Tan value I used was for 85

[@fergusrb]

***** Yeah Dave, you did not make a mistake. You did that on purpose to see how many people were paying attention. looks like it worked. :-) :-)

[@honeybadger660]

hey Dave what is your email. thanks Chris

[@psychobillywreckingball8464]

CUT YOUR HAIR HIPPY :) JK

[@thaiguysabu]

math and bushcraft..... i don't like it. it does help a little that it comes from you, but morons, like myself, don't want to have to think too much. our heads will start to hurt, and i'm asian. i should get this readily.

[@amandamiller94]

sorry 2 say Dave but u lost me there math was never my thing