Cave Survey - Brunton Pocket Transit User Guide

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For more detailed information on caving techniques, caving gear, and cave projects, visit my website at: www.derekbristol.com
Caves are delicate and potentially dangerous places. For more information on wild caving, vertical caving techniques, and cave survey, visit the National Speleological Society website:
caves.org
To find a local grotto (caving club) visit:
caves.org/committee/i-o/grott...
White Nose Syndrome (WNS) is a disease that is devastating to bats. To learn more about what you can do to help, along with information on how to properly decontaminate caving gear, visit:
caves.org/WNS/index.shtml
Cave Videography Gear I Use: (Note that these are affiliate links)
Full-frame Low-Light Camera - amzn.to/2TkIUxT
In-Cave Fast Prime Lens (a7iii) - amzn.to/2TnkB27
General Purpose Zoom Lens (a7iii) - amzn.to/2Trc2Uf
Wide Angle Zoom Lens (a7iii) - amzn.to/2Duwuhl
Gimbal - amzn.to/2TKccpT
ND Filter - amzn.to/2PAvBuJ
Soft-Case for Caving (a7iii) - amzn.to/2QanKDA
Tripod - amzn.to/2PVGrvv
Camera Bag - amzn.to/2RZekYT
Helmet-Mounted Action Camera: amzn.to/2qTa0yT
Drone - amzn.to/2PRs7nU
APS-C Run and Gun Camera - amzn.to/2DKTMQU
In-Cave Prime Lens (a6500) - amzn.to/2DuyLZK
General Purpose Zoom Lens (a6500) - amzn.to/2Q5Mgpw
Wide Angle Zoom Lens (a6500) - amzn.to/2Tnl98b
Soft-Case for Caving (a6500) - amzn.to/2OPF6Be
Hard-Case for Wet Caving (a6500) - amzn.to/2DxFOki

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Опубликовано:

24 июн 2024

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Комментарии : 29

@pbalister 4 года назад

Ah this brings back memories of the glory days of cave surveying! Brilliant video and should be required viewing for all new cave surveyors before moving on to suuntos and distos!

@karladenisseguerrerorosale9041 3 года назад

Excellent video, thank you.

@chadkeith7592 4 года назад

I have one of these, thank you for the information I knew nothing about..

@DrewNorthup 4 года назад

Well done. I didn't know those were so much more temperamental than my lensatic compass. I learned something.

@vladislavshevchenko331 Год назад

The best video with m2 that i found in youtube. Thanks!

@bretgreen5314 Год назад

Thank you; this answered multiple questions I had : )

@jaykennedy2411 4 года назад

Derek, thanks again for another excellent video! Have both composite and metal. Compass/clino that I first learned on. At VPI we had about 6 club property ones with light mud perpetually on them! Awesome tool.

@DerekBristol 4 года назад

Thanks Jay. I learned to survey in about 1991 on Sistecos. Admittedly I've never been on a trip where Bruntons were used, but have always had an interest. I made the video partly to educate myself, but also to round-out the information on my website in an effort to make it more comprehensive.

@jeffengland9913 5 месяцев назад

I have an old keuffel and esser compass with east and west reversed. It was my father's. Information I have found says it is a military compass. My father was in ww2 fighting the Japanese. But still not sure if this was carried by him. It's a little larger than any other military compass I have owned before. Info I have says it was made between 1925 and 1936.

@chantelclements5436 2 года назад

How do you manually damp the motion of the Brunton needle??

@horseinsport 2 года назад

i bought one of these a while ago. when i sit it flat on the table it never shows level by the bubble and often the needle is binding. is that common should I send it for service? seems to me flat on the table the needle should have free travel and such...

@Nguagemaster 4 года назад

Could you make a video on oversuit care and maintenance please, can't find any online really. Thanks.

@DerekBristol 4 года назад

I'm thinking of doing a few reviews on cave over suits. I have the AV one and two-piece suits, a Meander nylon and PVC, and an older Lost Creek. I'll probably talk a little about care and maintenance in the reviews.

@alaba5085 2 года назад

1:20 Yesterday I bought a compass but the long air level and circle air level aren't between the lines in the same time 3:03 . Is it a factory error ? I don't know what to do

@DerekBristol 2 года назад

The circular level is used when taking azimuth readings, and the cylindrical level is used when taking inclination measurements. They don't both need to be leveled at the same time. It's just a coincidence that they look this way in the video at 3:03.

@carls.6746 3 года назад

just got a 2010 new old stock M2 military version... the dial it not accurate. the dial can be off by 10 to 40 mils. for instance when north points to 0 south points to 3180 (-20) and: N at 1000 to S at 4160 (-40) N at 2000 to S between 5160 and 5180 (-30) N at 3000 to S at 6200 (which is correct) N at 4000 to S between 820 and 840 (+30) N at 5000 to S at 1820 (+20) N at 6000 to S between 2780 and 2800 (-10) even the bubble in the bubble level for the inclinometer is a 1/3rd the size it should be. is this normal? just spent an hour on ebay and of the ones in seemingly good enough condition to catch my eye i saw that a lot of them seemed NOT to have their N and S point on the needle read exactly 3200 away from each other. soooo would it still be accurate to use especially in navigation? the one in the video in on point. the manufacturer mark is EMERSON CO. ROLLING MILLS EST.CA 4BUR2 serial no. 2510 05/2010 19200 MIL-C-58052 (BLANK NOTHING) EDIT: just got a metal one made in 1980 and its much better. i made sure to carefully check the pics. although the sight window is glass and not just a wire the dampening and stability of the needle is far better then the 2010 plastic version. just the way the needle moves i could tell the quality increase is considerable. serial no. 215783 4/80 19200-MIL-C-58052 2R524

@thanakornsinthatheeyakorn4901 11 месяцев назад

Should I get brunton m2 or harbin dgl-8

@ericrollins4607 6 месяцев назад

So how would the accuracy of the mirror method on a pocket transit compare to using a hand bearing compass like the Suunto KB-14 when taking azimuths?

@DerekBristol 6 месяцев назад

Accuracy and precision is about the same, i.e. within 0.5 degrees. Most people would agree that using a Suunto is easier than a Brunton in most situations.

@j.davidc6846 2 года назад

Sun 2

@TheMarsgia 3 года назад

Sorry for asking. Im a dummy when ti comes to compass. Just starting out. Will you recommend this for Hiking Trekking?

@clintonelmore8366 3 года назад

We used them for nearly everything in field geology. They are pretty much bombproof and can do anything any other compass can do. They just cost a lot.