Land Navigation: Intersection and Resection

Intersection and Resection are both ways to locate something unknown from one or more known places. Either calculating the grid location of an object in the distance or finding your own location, these techniques will prove essential during land navigation.

[@onez8978]

Now do that in the darkness of night, under light fog, rolling forested terrain, while on patrol in a unfriendly area where you just broke contact with hostile elements and you’re trying to find the rally point but everyone’s turned around and still waiting for their ears to stop ringing from small arms fire. 🤙🏼

[@TheOpethOfMastodon]

Garmin helps

[@losttribe1993]

No Dagger or the AN/PSN11? Man that would b a pain

[@brockmorris8764]

You wouldn’t have to do that because you should already have consolidated and reorganized after breaking contact, and you have a point man, PL, and pace man, that knows exactly where you are because of B&G plan. And you’re CM on mission, or RTB. Either way not something you’re gonna need to do, but way to try and sound badass for everyone. 🤣

[@MrRocque]

this is the ONLY video (that I've seen, to date) using the 'game' that actually mentions declination and 'converting' magnetic bearings to the map's grid bearings. NICE JOB. I see ppl commenting on other videos about how they learned from other vidoes 'how to do resection', yet declination and 'back azimuth' aren't ever mentioned in them. Those that don't understand why declination is important, where I live, its 18°E, without compensating, in just 2km. I'd miss my target by 600m to the east.

[@carsonp.7009]

you can basically consider military simulators as real life

[@dwaynerobertson383]

And this is precisely why I always check out the comments for videos. Invaluable information, very often. Thank you for highlighting that. VITAL information.

[@Rohith.]

Where do you live?

[@MrRocque]

@@Rohith. doesn't matter where I live. Look at a magnetic declination map. there's all kinds of huge declination, some up to 40 degrees. The point of the comment was that some videos fail to mention declination when "instructing" others. When converting a compass reading to a map (and visa versa) MOST of the world HAS TO consider declination. This video considered that.

[@user-wg3wj6ur9z]

If your compass is adjusted you wouldn’t need to convert?

[@domenicmariano2110]

Hi, really outstanding videos. I have just a quick question. -When you plotting a GRID coordinate, the North of the Protractor ALWAYS need to match the North of the Map? Correct. -I am confusing when I oriented my MAP with TERRAIN ASSOCIATION and the I want to PLOT A GRID coordinate with a Protractor. In this case, do I need to RE-ORIENT my MAP with the NORTH of my Protractor and North of the MAP? or just matching the terrain futures? Thank you.

[@SkreenGG]

OMG, very helpful!! Been trying to figure out both of these for an upcoming board and this video explains it perfectly!

[@BEstudent]

Isn't a protractor included in todays civilian baseplate compasses (the adjustable ring on the outside of the housing)? And doesn't make that calculation of a back azimuth obsolete?

[@FlagFlyingHigh3]

Evert Clowting I know you posted this 11 months ago but the adjustable ring on the outside of the compass is called the bezel ring( every click is 3 degrees. Its mostly used during night navigation so you don't have to use light to bead in a azimuth. A protracter is used for calculating azimuth on a map and pulling grids and a compass determines magnetic azimuth. To convert between the two you would use the declination diagram at the bottom of the map it varies depending on where you are at in the world. Either you add or subtract, it tells you how to convert. For back azimuth, ya you can look at the other side of the protractor or compass but to get it mathematically (the sure way) you simply add 180 degrees if your azimuth is less than 180 and subtract 180 if its greater than 180. For mils you would use 3200 mils and use the same equation. Forward Observer in the US Army

[@merdemoiii-7589]

AIC UH UH (if I fail don’t mind this comment)

[@johnvines4875]

with back azimuth why + 180 then - 360, why not straight minus 180

[@Rohith.]

You have to substact 360 only when it crosses 360

[@koocherify]

@@Rohith. if your azimuth is over 180 you can subtract 180 and get the same as adding adding 180.and subtracting 360

[@Rohith.]

@@koocherify yeah:)

[@Rohith.]

@@koocherifyHey. where are you from? Are you pursuing civil engineering just like me.

[@waxcontrol8124]

I just watched this video and have no clue what they are talking about. I need video #1 for someone who knows nothing.

[@Ray_Mac]

I did not learn the same terminology the military uses when I learned land nav, so now I *finally* know what a freaking "resection" is!!

[@BEstudent]

Isn't in the civilian baseplate compasses of today a protractor included (the ring you can adjust on the outside of the compass housing)? And doesn't make that feature calculating a back azimuth obsolete? I am a beginner in this subject so spare me! :D

[@diogoafonso6993]

Evert Clowting it s possible to triangulate your location only with a compass and map ?

[@theveldtrekker2550]

@@diogoafonso6993 no, you'd need a pencil, ruler & protractor

[@TheReem506]

hey thats the romanian flag

[@wandergun2581]

ini ada video seru: kzbin.info/www/bejne/eKSbn6CmnMp8e5o

[@edwindude9893]

Intersections are pointless because you know where you are. Learn resections well gents and forget intersections.

[@user-wg3wj6ur9z]

Intersections are useful for identifying a locations coordinates tho.

[@theVoid524]

do you still have to convert to a grid azimuth if you plug the declination into your compass when you orient the map?

[@gabrieleciciriello6447]

Rushfan32935 no you shouldn't

[@user-wg3wj6ur9z]

@@gabrieleciciriello6447 thanks I asked the same question above.

[@nicholasflamel1]

what is the name of this videogame/simulator and where/how can i get it?

[@cracka5431]

Just get an Arma game

[@dekster14LP]

It's VBS (Virtual Battle Simulation), you can use the game Arma (1/2/3), which shares features and certain models with this simulation.

[@matthewgrech6484]

What is the name and brand of the compass used in this video please ?

[@shooter963]

It’s called a lensatic compass. Current issue is manufactured by Camenga.

[@AltonRowell-gb1lb]

Sounds like ground gps.

[@jcfontana86]

Hello where I can download the mission or video game to practice in my pc?

[@carsonp.7009]

the game(i believe) is called VBS1,2,3, or 4 i dont know probably 1 or 2, i only know this because i play a lot of Arma, and the creators are the same, Bohemia Interactive, i believe it was origanally designed for military training, as seen in the video, because of the university of the assets in it

[@AltonRowell-gb1lb]

Jean Fontana cool.

[@Dogmeat1950]

just get the game ARMA 3 it's damn near the same thing

[@user-wg3wj6ur9z]

How do you do this in the dark!?

[@waxcontrol8124]

Either night vision goggles or wait until day light.

[@egaaprilia4280]

again...

[@oscarcruzsosa7407]

where do you get 16.1?

[@NUCL3ARTAC0S]

16.1 degrees is the the declination angle. It's the angle between grid north and magnetic north. The earths magnetic pole is constantly moving and so theres a difference between it and the Earths geographic north pole.