DID UBOAT's knew depth under keel?

Niume · 01-22-17, 03:12 AM

Hello I have a question. I was watching hell under the sea its a show on national geograchic about uboats. So episode was about operation drumbeat manly the U-boat U-123. U-123 was chased by norvegian ship trying to ram him. But U-123 could'nt dive because he din't knew the depth under keel? because of poor naval maps. But could'nt uboat just send a ping under the keel and measure it?
I am confused because in sh 3 you can check depth.
Anyone please tell me

fumo30 · 01-22-17, 03:34 AM

Quote:
"German U-boats were equipped with a device called an "Atlas Echolot".This functioned just like the old "flasher" fish-finders and gave the U-124's captain the accurate depth of water."

http://www.sidco.org/papooseA.html

I don't know why couldn't U-123's captain use the device, maybe it was broken???

ivanov.ruslan · 01-22-17, 04:48 AM

As far as I could tell by reading some historical documents, they had a problem with diesel in the last minutes before the collision, they managed to repair the engine, refer to the appropriate deeper water and hide, shoot a previously flares on the bridge of the ship

Niume · 01-22-17, 12:39 PM

Thank you for replies. Maybe the show made mistake.

ValoWay · 01-22-17, 01:42 PM

i was always under the impression that nearby warships would detect me when I send a ping downwards?

rudeltaktik · 01-23-17, 10:40 AM

I read "Operation Drumbeat" , if I recall correctly without opening book...

Hardegan was in shallow waters off the southern coast of Long Island when the incident with the Norwegian merchant vessel happened. He mentioned that they were so close to shore, that they could smell the evergreen trees (Fire Island?).

The Norwegian vessel heading east from NYC, caught U-123 off guard and it did not have enough time to properly (safely) dive without hitting bottom. I think Hardegan was uncertain of the clearance above the conning tower if he dove. On the surface, u-boote is faster and more maneuverable than it's submerged. Besides, U-123 would have possibly been steam rolled if Hardegan decided to dive at that shallow depth.

In the book, there was no mention of the "Atlas Echolot" on board U-123 being damaged.

UKönig · 01-29-17, 02:01 PM

Quote:

Originally Posted by ValoWay

i was always under the impression that nearby warships would detect me when I send a ping downwards?

That is a real possibility when using any active (rather than passive) electronics. Take care when using echolocat or your sonar range finder, when enemy warships are about..

01-22-17, 03:12 AM	#1
Niume Sea Lord Join Date: Sep 2015 Location: Lithuania Posts: 1,633 Downloads: 499 Uploads: 2	DID UBOAT's knew depth under keel? Hello I have a question. I was watching hell under the sea its a show on national geograchic about uboats. So episode was about operation drumbeat manly the U-boat U-123. U-123 was chased by norvegian ship trying to ram him. But U-123 could'nt dive because he din't knew the depth under keel? because of poor naval maps. But could'nt uboat just send a ping under the keel and measure it? I am confused because in sh 3 you can check depth. Anyone please tell me __________________ GLORY TO UKRAINE! [ENG] SH 4 KSD II Ace Edition

01-22-17, 12:39 PM	#4
Niume Sea Lord Join Date: Sep 2015 Location: Lithuania Posts: 1,633 Downloads: 499 Uploads: 2	Thank you for replies. Maybe the show made mistake. __________________ GLORY TO UKRAINE! [ENG] SH 4 KSD II Ace Edition

01-22-17, 03:34 AM	#2
fumo30 Grey Wolf Join Date: Jan 2016 Posts: 872 Downloads: 15 Uploads: 0	Quote: "German U-boats were equipped with a device called an "Atlas Echolot".This functioned just like the old "flasher" fish-finders and gave the U-124's captain the accurate depth of water." http://www.sidco.org/papooseA.html I don't know why couldn't U-123's captain use the device, maybe it was broken???

01-22-17, 04:48 AM	#3
ivanov.ruslan The Old Man Join Date: Oct 2012 Location: Pleven,BG Posts: 1,577 Downloads: 901 Uploads: 0	As far as I could tell by reading some historical documents, they had a problem with diesel in the last minutes before the collision, they managed to repair the engine, refer to the appropriate deeper water and hide, shoot a previously flares on the bridge of the ship

01-22-17, 01:42 PM	#5
ValoWay Lieutenant Join Date: Feb 2014 Location: TubeONE Posts: 250 Downloads: 103 Uploads: 0	i was always under the impression that nearby warships would detect me when I send a ping downwards?

01-23-17, 10:40 AM	#6
rudeltaktik Swabbie Join Date: Nov 2005 Posts: 13 Downloads: 28 Uploads: 0	I read "Operation Drumbeat" , if I recall correctly without opening book... Hardegan was in shallow waters off the southern coast of Long Island when the incident with the Norwegian merchant vessel happened. He mentioned that they were so close to shore, that they could smell the evergreen trees (Fire Island?). The Norwegian vessel heading east from NYC, caught U-123 off guard and it did not have enough time to properly (safely) dive without hitting bottom. I think Hardegan was uncertain of the clearance above the conning tower if he dove. On the surface, u-boote is faster and more maneuverable than it's submerged. Besides, U-123 would have possibly been steam rolled if Hardegan decided to dive at that shallow depth. In the book, there was no mention of the "Atlas Echolot" on board U-123 being damaged.