Question about using the U-jagd

John Pancoast · 01-02-21, 09:59 AM

I'll echo derstosstrupp's comments about visually determining speed. With a little bit of practice it's easy to determine speed via shadowing/matching speed, the bow wave and/or the smoke column.

BritTorrent · 01-02-21, 03:51 PM

Thanks for the answers guys. Really informative!

Andrewsdad · 01-03-21, 06:22 PM

Salute !!!
Here is my method when timing for target speed:

Set my boat course to about 20 Degrees or so to the targets course.

Set my speed to dead slow... (subs cannot realistically hold depth at zero speed.)
Periscope trained at 0 (180 for stern shots).
Only raise the scope for very short period of time, just enough to start the chronometer when the target crosses the wire.

Down scope... pay some attention to the sound man reports as he calls out the target position changes.
Raise the scope quickly and note how far along the ship the wire is... down scope!
When you think the time is getting close, raise the scope just enough to see and stop the chronometer when the wire crosses the stern of the target. Now is a good time to get the AOB. Be quick about it....

Down scope.. Ahead One Third!, Rudder Full Over to get your boat on the attack course. Input the AOB into TDC.

Now do the math or use the calculation wheel to get the target speed and enter it into the TDC.
You did note the target AOB when you did the target stern crossing the wire, didn't you?

The key is to keep observations as short as possible while getting the maximum information from each peek.

AD

Aktungbby · 01-03-21, 09:18 PM

^Andrewsdad! Nice silent run!

While you're practicing target speed on those oil tankers south of the Bay Bridge on the commute into SF, here's one I nailed at 0 degree; 400 yard; doing 0 knots!

Andrewsdad · 01-04-21, 09:54 PM

When crossing the Benicia Bridge or going southbound on I-680 I estimate AOB on the freighters in the mothball fleet. You gotta be quick because the view is short due to trees and terrain also since I am driving it wouldn't do to make a bad course change into another vehicle.

AD

01-02-21, 09:59 AM	#1
John Pancoast Ocean Warrior Join Date: Apr 2002 Location: Minnysoda Posts: 3,211 Downloads: 501 Uploads: 4	I'll echo derstosstrupp's comments about visually determining speed. With a little bit of practice it's easy to determine speed via shadowing/matching speed, the bow wave and/or the smoke column. __________________ "Realistic" is not always GAME-GOOD." - Wave Skipper

01-03-21, 09:18 PM	#4
Aktungbby Gefallen Engel U-666 Join Date: Jul 2013 Location: On a tilted, overheated, overpopulated spinning mudball on Collision course with Andromeda Galaxy Posts: 30,069 Downloads: 24 Uploads: 0	welcome back! ^Andrewsdad! Nice silent run! While you're practicing target speed on those oil tankers south of the Bay Bridge on the commute into SF, here's one I nailed at 0 degree; 400 yard; doing 0 knots! Alright Alright! I'm taking *'liberties'with the truth: it's the USS Liberty Jeremiah O'Brien,* D-Day survivor, at the recent devastating Pier 45 waterfront fire getting slightly scorched but escaping relatively undamaged! Her loss would have been real bummer; but for a fast tugline and the fireboat! __________________ "Only two things are infinite; The Universe and human squirrelyness?!!

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01-02-21, 03:51 PM	#2
BritTorrent Watch Join Date: Oct 2005 Posts: 26 Downloads: 191 Uploads: 0	Thanks for the answers guys. Really informative!

01-03-21, 06:22 PM	#3
Andrewsdad Machinist's Mate Join Date: May 2001 Posts: 130 Downloads: 81 Uploads: 0	Salute !!! Here is my method when timing for target speed: Set my boat course to about 20 Degrees or so to the targets course. Set my speed to dead slow... (subs cannot realistically hold depth at zero speed.) Periscope trained at 0 (180 for stern shots). Only raise the scope for very short period of time, just enough to start the chronometer when the target crosses the wire. Down scope... pay some attention to the sound man reports as he calls out the target position changes. Raise the scope quickly and note how far along the ship the wire is... down scope! When you think the time is getting close, raise the scope just enough to see and stop the chronometer when the wire crosses the stern of the target. Now is a good time to get the AOB. Be quick about it.... Down scope.. Ahead One Third!, Rudder Full Over to get your boat on the attack course. Input the AOB into TDC. Now do the math or use the calculation wheel to get the target speed and enter it into the TDC. You did note the target AOB when you did the target stern crossing the wire, didn't you? The key is to keep observations as short as possible while getting the maximum information from each peek. AD

01-04-21, 09:54 PM	#5
Andrewsdad Machinist's Mate Join Date: May 2001 Posts: 130 Downloads: 81 Uploads: 0	When crossing the Benicia Bridge or going southbound on I-680 I estimate AOB on the freighters in the mothball fleet. You gotta be quick because the view is short due to trees and terrain also since I am driving it wouldn't do to make a bad course change into another vehicle. AD