The Osborne Fire Finder 

nice one hehe

+vmfjru47 Its Harry.

+stevenan93 His name is Henry.

Where the fuck did you get Harry from?

You use this to.. Oh Fuck me!

Good God, language lady.

It's disappointing that you dont use the firefinder in the game

T Hh You're welcome

what game

​@@ViatorNLFirewatch, highly recommended

@@ViatorNL Firewatch

@@Pikachugamer-2007 rangefinder? Well, sort of. Actually what it is is a directional indicator. You line up the smoke with the heading on the fire finder, and you have the exact direction, or azimuth, of the fire from your location. Actual range is dependent upon whether you can see the base of the fire, and if you know how far away it is. For myself, we have a lot of mountains and valleys, and I often can't see the base of the fire. I have to use my best guess for distance sometimes, but at the very least I can provide a heading. If another fire lookout Tower can see it, they can also provide a heading, and then you can triangulate the actual location. Hope this helps.

I think it's Alidade.

Oh no, it made sense to me. I just was curious about how it's used.

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Ray Trussell why thank you I'll look into it.

Because a map and Compass wouldn't be nearly as accurate, especially inside of a steel-framed structure. With this, you point it at the direction of the smoke and then have an instantaneous heading that is accurate to within a half of degree. Of course that depends on the fire finder being pointed due north. Once you have it calibrated though, it won't change unless you move the building. The firefinder is literally bolted to the cab. Also, dispatch has a computer so that if more than one Lookout can sight the smoke, then they can enter both azimuths and it will give them a location that is as accurate as the degrees given by the Lookouts. It can literally compute the street and nearest cross street for the ground Crews. However, you are quite right in the fact that this is nothing more than a glorified compass and a map. Just a bit more accurate, especially if the lookout knows the location and terrain well.

I'm not sure I understand your question, what do you consider the vernier scale? The horizontal readout above the azimuth or vertical part for elevation of the firefighter?

Or reference the time of the video so I can see what you mean..

@@humunguswarrior What appears to be a vernier scale is the curved engraved brass readout strip above the azimuth ring - it is attached to the outer face of the rotating top section of the firefinder with two brass screws - it is most visible from about 01:36 - 01:47 in the video, and is in clearest focus around 01:45. and has the numbers "10" and "20" engraved on it, with 10 vertical divisions inbetween. At 01:45 the rightmost vertical brass engraved line is aligned with a horizontal azimuth line, and the vertical brass engraved line labelled "10" is about midway between two horizontal azimuth lines, so perhaps this is a vernier scale for reading to 1/20 of a degree in azimuth? Oh - I think I've found the answer. The azimuth ring is divided into 1/2 degree increments (30 minutes of arc), and the brass vernier scale has 30 divisions, each representing 1 minute of arc. The process of reading the vernier on a 1934 Osborne Fire Finder is walked through in detail in the video "How to Use an Alidade", in the section "Finding the Azimuth", here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EiqtNc8kauk.html Found some more - there's a .pdf manual on how to use the Fire Finder, including the use of the vernier, here: tnlandforms.us/data/osborne.pdf The original manual from which the above was taken can be read online here: tnlandforms.us/data/osborne.pdf

+presmadagascar recently released game where you are a guy who went on to be a fire lookout

+presmadagascar A video game set in a fire lookout and the surrounding woods. The game starts with an explanation on how to do your job, when they get to the Osborne Fire Finder they get interrupted before they explain it. So a bunch of curious people are googling it.

its a video game that mentions the osborne fire finder but then suddenly stops because of events in the game so a lot of people get extremley curious and search it up