Chartwork Tutorial: Running Fix

★ / casualnavigation
For more help and assistance learning marine navigation, as well as lots of informal discussion about creating maritime content on TH-cam, why not consider joining our community on Patreon.
---------ABOUT THE VIDEO---------
In this video, I show you how to complete a running fix.
---------DISCLAIMER---------
This video should not be considered professional advice or education.
We try to make the content as accurate as possible, but the responsibility rests with the viewer to determine the full accuracy and reliability of the content.
Any action you take as a result of watching this video is strictly at your own risk.

[@CaralineRLevy]

Thank you for explaining the purpose of a running fix so clearly.

[@cadenorris4009]

I finally understand now after taking a pen, paper, and ruler and mapping this out. So if I understand correctly, the first LOP gives you the set of all possible positions you could be at 2200 from the azimuth to the tower. Simple enough. Then, after 30 minutes, assuming your ground speed and course was correct, you know the new line of all possible positions you could be at 2230. (Take the first LOP and advance it using your course and speed). However, the other LOP you get from the azimuth to the tower at 2230 is ALSO a set of all possible positions you could be at (you HAVE to be somewhere on that line).
By taking the intersection of those two lines, you can find your position both at 2230 and 2200 because you must be at a point on both lines.
This is really cool geometry, I only wish I figured it out on my own! Oh well.

[@TERRYBIGGENDEN]

Excellent. Can you also show doubling the angle on the beam (have I got that correct?). I knew it once= and it seemed very useful. :-) Great series.

[@mattsains]

I only knew about your other channel and needed to review running fixes. I was like, wait a minute I know this voice 😮

[@JG-mf1yk]

Glad you restarted. This chart is my playground

[@RefreshMaritime]

Thanks JG. I'm glad you enjoy it.

[@JG-yx1to]

I love your videos. I watch them in order to brush up for my internships as a cadet

[@RefreshMaritime]

Thanks JG. Good luck with your studies.

[@souhardamukhopadhyay8307]

please come up with a few more videos which would help us in oral preparation... the way u explain things really get stuck into my mind...
thanks alot Sir🙏

[@michaellinehan710]

Great content as always - I love directing the naval cadets that I teach towards your videos for when they are about to start their navigation courses - always good for a refresher myself!
Though a 30 minute fixing interval with a two point running fix would have me throttled! I'd be looking at taking bearings every 30° change to update the running fix until it was no longer useful; plus a radar range, if possible. (Obviously this video was simplified for instructional purposes, just me being a keen navigator!)

[@josephadereni8202]

Please add the question to video description, this helps alot

[@khurramfarooqui6184]

Simply awesome

[@Wintersghost135]

Your way was prob simpler, easier to learn, and more elegant. But when your only tool’s a hammer, everything looks like a nail. I don’t know shipping charts but I do know trig - which is my hammer that I try to use for everything. I’d take a second bearing when the tower was at 90 degrees to the ship. Then you got two angles. And the distance traveled by the ship gives you the length of the base of the triangle. Tan theta gives you the distance to the tower when the ship’s at 90 degrees to it. Or you could take a 2nd bearing as on the vid. If the angles are equal, then you get an isosceles triangle. Then bisect the triangle into two right triangles. It’s a little more math to figure up all the angles and legs of the triangles but it’ll still get you there. I learned basic trig in a high school conservation class designed for underachievers like myself. We used it to estimate tree height.

[@RefreshMaritime]

I've never done it that way, but it sounds like it might make a fun video one day.

[@reifukaiyukikaze]

Good technique.....what bother is that why season sailors put soo much trust in that speed distance as constant the whole time it passes....it isn't
That running fix final position is actually a guess too

[@joegrabicki9586]

Excellent explanation. Thank you.

[@farqfarq2225]

Very good 🤠
Keep it up

[@RefreshMaritime]

Thanks

[@alisterdickson4476]

Excellent content as always thank you

[@matthewlea4073]

Great explanation

[@tryazeve9420]

Brilliant video

[@a.m.a5122]

thank you!
are those signs and terms internationally recognised?

[@dreamtimesv]

Nice explanation, thanks

[@RefreshMaritime]

Glad it was helpful!

[@sithabisomsane3017]

What software are you using
I would love to use teaching my students.
By the way i have learnt alot from this channel
Hope my students don't find my comment 😂

[@RefreshMaritime]

For this one, I tried Photoshop.

[@juswa2380]

Great content Sir 💯

[@RefreshMaritime]

Cheers Juswa

[@entropyachieved750]

Great vid

[@RefreshMaritime]

Thanks

[@vicentiudragosbasa6545]

Awesome!

[@RefreshMaritime]

Thanks!

[@Collideable]

♥️

[@tod2992]

Man... I would have run aground by now...

[@eliakamel7805]

Satisfied subject🫡