SUBSIM Radio Room Forums



SUBSIM: The Web's #1 resource for all submarine & naval simulations since 1997

Go Back   SUBSIM Radio Room Forums > Silent Hunter 3 - 4 - 5 > Silent Hunter 5
Forget password? Reset here

Get ready for a whole new level of realism!
Reply
 
Thread Tools Display Modes
Old 11-19-21, 08:21 PM   #196
Alpheratz
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by derstosstrupp View Post
Thanks Alpheratz! Great work as always!
  Reply With Quote
Old 11-20-21, 08:40 PM   #197
derstosstrupp
Grey Wolf
 
derstosstrupp's Avatar
 
Join Date: Aug 2008
Posts: 837
Downloads: 483
Uploads: 0


Default

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!
__________________
Ask me anything about the Type VII (procedures, crew, systems etc)!

One-Stop Targeting Shop:
https://drive.google.com/drive/folde...WwBt-1vjW28JbO
My YT Channel:
https://www.youtube.com/channel/UCIJ...9FXbD3S2kgwdPQ
derstosstrupp is offline   Reply With Quote
Old 11-21-21, 05:10 AM   #198
Alpheratz
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

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).
  Reply With Quote
Old 11-22-21, 10:02 AM   #199
SnipersHunter
Samurai Navy
 
Join Date: Dec 2012
Location: Germany
Posts: 596
Downloads: 200
Uploads: 0
Default

I am currently starting to lern celnav thanks to Alpheratz excellent series. Can not wait to do a full patrol without needing my navigator.
SnipersHunter is offline   Reply With Quote
Old 11-22-21, 11:10 AM   #200
Alpheratz
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by SnipersHunter View Post
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.
  Reply With Quote
Old 11-23-21, 11:41 AM   #201
SnipersHunter
Samurai Navy
 
Join Date: Dec 2012
Location: Germany
Posts: 596
Downloads: 200
Uploads: 0
Default

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

SnipersHunter is offline   Reply With Quote
Old 11-23-21, 01:27 PM   #202
Alpheratz
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Eloquent evidence to the contrary
  Reply With Quote
Old 11-27-21, 05:40 AM   #203
Alpheratz
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

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.

Last edited by Alpheratz; 12-07-21 at 12:36 PM.
  Reply With Quote
Old 12-14-21, 10:18 AM   #204
Alpheratz
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default Nautisches Jahrbuch 1941 for SH5 TWoS

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

  Reply With Quote
Old 12-15-21, 07:19 AM   #205
derstosstrupp
Grey Wolf
 
derstosstrupp's Avatar
 
Join Date: Aug 2008
Posts: 837
Downloads: 483
Uploads: 0


Default

Quote:
Originally Posted by Alpheratz View Post
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.
__________________
Ask me anything about the Type VII (procedures, crew, systems etc)!

One-Stop Targeting Shop:
https://drive.google.com/drive/folde...WwBt-1vjW28JbO
My YT Channel:
https://www.youtube.com/channel/UCIJ...9FXbD3S2kgwdPQ
derstosstrupp is offline   Reply With Quote
Old 12-15-21, 07:57 AM   #206
Alpheratz
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by derstosstrupp View Post
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.

Last edited by Alpheratz; 12-15-21 at 07:38 PM.
  Reply With Quote
Old 12-15-21, 12:18 PM   #207
derstosstrupp
Grey Wolf
 
derstosstrupp's Avatar
 
Join Date: Aug 2008
Posts: 837
Downloads: 483
Uploads: 0


Default

Hopefully with the new Discord server more people’s interest gets piqued.
__________________
Ask me anything about the Type VII (procedures, crew, systems etc)!

One-Stop Targeting Shop:
https://drive.google.com/drive/folde...WwBt-1vjW28JbO
My YT Channel:
https://www.youtube.com/channel/UCIJ...9FXbD3S2kgwdPQ
derstosstrupp is offline   Reply With Quote
Old 04-29-22, 04:10 AM   #208
ybar
Watch
 
Join Date: Mar 2010
Location: Belgium
Posts: 20
Downloads: 254
Uploads: 0
Default Calculator HR2

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
__________________
Host french portal "Mille-Sabords.com"
(sorry for my bad english)
ybar is offline   Reply With Quote
Old 04-29-22, 04:12 PM   #209
les green01
Seasoned Skipper
 
les green01's Avatar
 
Join Date: Jan 2002
Location: Freeman Missouri
Posts: 1,600
Downloads: 1301
Uploads: 0
Default

Quote:
Originally Posted by SnipersHunter View Post
Just leaving this here for the people that claim celestial navigation should not be the job of a commander.

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
__________________
I'll tell you what bravery really is. Bravery is just determination to do a job that you know has to be done.
Audie Murphy
les green01 is offline   Reply With Quote
Old 04-29-22, 09:47 PM   #210
Sean C
Grey Wolf
 
Join Date: Jun 2017
Location: Norfolk, VA
Posts: 860
Downloads: 12
Uploads: 2
Default

Quote:
Originally Posted by ybar View Post
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

It looks very similar to the Bygrave or Fuller cylindrical slide rules. I'm sure someone at NavList would know more about it.
__________________
If you have a question about celestial navigation ... ask me!
Celestial Navigation Spreadsheet
Sean C is offline   Reply With Quote
Reply

Tags
celestial navigation, sextant

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 04:21 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Copyright © 1995- 2023 Subsim®
"Subsim" is a registered trademark, all rights reserved.