:salute:

Not sure how many others are doing full celnav out there, but for those who are, please share your routine (your “day’s work in navigation”). Here’s mine below. For sight reduction I use various tabular methods (S-table, F-Tafel, or Fulst’s Nautical Tables) or a calculator if not feeling up to crunching logarithms.

1. Morning twilight 2-star fix.

2. Calculate LAN for the approximate longitude I will be around LAN.

3. Take a sun sight about 3 hours before LAN for a sun line.

4. Take a latitude sight at LAN and advance the morning sun line for a running fix.

5. Take a sun sight about 3 hours after LAN. I won’t typically reduce this unless I can’t get evening stars or am otherwise diverted (by a target sighting etc). In that case I’ll advance the LAN latitude line for another running fix.

6. Calculate time of sundown and plan on being on the bridge shortly thereafter.

7. Evening twilight 2-star fix.

8. Calculate time of sunup and plan to be on the bridge about 30 minutes prior.

9. Hit the sack - I’ve earned it.

For my dead reckoning, I keep a log in a notebook, making an entry each time I change course, speed, save and exit, or get a fix.

The one concession I make is I pretend every target I sink radios its position and that it’s accurate. It’s my reward for sinking things.

Please share your approach!

I showed my CelNav routine in the video "Silent Hunter 5 Wolves of Steel: what is Real navigation in 2021" and in general it is similar to what derstosstrupp does:

https://www.subsim.com/radioroom/sho...62521&page=240

Of the two stars, one is usually Polaris to save time.

For calculations I use either F-Tafel or my excel spreadsheet "SH5 celestial navigation Sun, Moon, 58 stars" (this is an updated version of my excel spreadsheet "SH5 celestial navigation" included in C: \ Ubisoft \ Silent Hunter 5 \ The Wolves of Steel - Documentation \ Real Navigation \ RealNav - almanacs and tables by Alpheratz), which can be downloaded from the link in my signature.

I recently got acquainted with Fulst's Nautical Tables, which seemed to me quite easy to use (many thanks to derstosstrupp for explaining and showing me how to use them).

I am currently starting to lern celnav thanks to Alpheratz excellent series. Can not wait to do a full patrol without needing my navigator.

I am delighted to hear that and you can count on my help if you need it.

Just leaving this here for the people that claim celestial navigation should not be the job of a commander. :03:

https://uboat.net/media/men/crew/commander_3.jpg

Eloquent evidence to the contrary :yeah:

The most up-to-date information and documents on celestial navigation in Silent Hunter 5 that are not yet included in TWoS are now in DISCORD. If you want to join, just send me a PM.

Nautisches Jahrbuch 1941 for SH5 TWoS
 

https://drive.google.com/file/d/1Zs4...ew?usp=sharing

https://i.postimg.cc/xCJcDXr6/image.png

Great work! I much prefer these old German almanacs that work in times instead of angles. To me, the calculation of LHA is quicker with them, and they make the calculation of the time of local apparent noon, nautical twilight etc easy without any additional tables.

Thank you, Matt! I was also surprised how easy and convenient Nautisches Jahrbuch is after Nautical Almanac - no increments & corrections tables: constant mittlere Sonne increments by 1 second of the R.A. every 6 minutes of time and 4 minutes (seconds) for each degree (arc minute) of longitude.

Of course, I was guided by pure enthusiasm when I started my work, and did not consider it possible to keep my "discoveries" a secret from the gaming community (for me personally, these discoveries are real, without any quotes) in the world of silent hunter 5. Nevertheless, I must admit that I overestimated the importance of astronomical navigation for the vast majority of players. Now I understand that my work cannot attract a wide audience, but I am glad when I see even single responses from truly enthusiastic and competent people who are able to appreciate my efforts. And for this I want to thank you again. :Kaleun_Salute:

Hopefully with the new Discord server more people’s interest gets piqued.

Calculator HR2
 

https://www.subsim.com/radioroom/<a ...or_HR2.jpg</a>Recently while reading a book on the Second World War, I was surprised to discover a celestial navigation tool that was on board the Uboote!
Do you have more information about this device?

Calculator_HR2.jpg

Some did but wasn't all the time just like one had a itchy trigger finger and after u-505 sunk the merchant planes was floating so commander jumped on the aa gun and sunk the planes

It looks very similar to the Bygrave or Fuller cylindrical slide rules. I'm sure someone at NavList would know more about it.