Contact position by hydrophone

Pisces · 07-29-08, 08:11 AM

Quote:

Originally Posted by KeptinCranky

..., it's tough to judge their heading though since there will be no report on those from your hydrophone operator.

http://www.subsim.com/radioroom/show...260#post875260

UnderseaLcpl · 07-29-08, 08:19 AM

Yep, hydrophones are your best friend. I patrol shipping routes by spending as much time as possible underwater at slow speed, listening.

I wonder why they seem to have such a short range in "Das Boot".

Jimbuna · 07-29-08, 10:24 AM

Try marking the tip or extreme of the contact line with the pencil then up the tc to x8. Plot a few more of the extremities and you'll soon get a rough idea of the vessels heading.

For a real rough guesstimate of the range, try measuring the length of the contact line.

KeptinCranky · 07-29-08, 01:06 PM

Yes, all of the above is fine, IF you get a line...

but with convoys that are say 35km out you don't get a line, you only get that when the sonarman finally decides that the ship you've been tracking for an hour is an actual honest-to-god contact
otherwise it's just a bearing and your best guess at the distance from what you can hear yourself.

if you start working with those lines and extend them to 35km the margin of error becomes fairly large

nevertheless, listening for contacts yourself is fun and useful

07-29-08, 08:19 AM	#2
UnderseaLcpl Silent Hunter Join Date: May 2008 Location: Storming the beaches! Posts: 4,254 Downloads: 0 Uploads: 0	Yep, hydrophones are your best friend. I patrol shipping routes by spending as much time as possible underwater at slow speed, listening. I wonder why they seem to have such a short range in "Das Boot". __________________ I stole this sig from Task Force

07-29-08, 10:24 AM	#3
Jimbuna Chief of the Boat Join Date: Feb 2006 Location: 250 metres below the surface Posts: 191,320 Downloads: 63 Uploads: 13	Try marking the tip or extreme of the contact line with the pencil then up the tc to x8. Plot a few more of the extremities and you'll soon get a rough idea of the vessels heading. For a real rough guesstimate of the range, try measuring the length of the contact line. __________________ Wise men speak because they have something to say; Fools because they have to say something. Oh my God, not again!!

07-29-08, 01:06 PM	#4
KeptinCranky Ace of the Deep Join Date: Apr 2007 Location: Netherlands Posts: 1,050 Downloads: 3 Uploads: 0	Yes, all of the above is fine, IF you get a line... but with convoys that are say 35km out you don't get a line, you only get that when the sonarman finally decides that the ship you've been tracking for an hour is an actual honest-to-god contact otherwise it's just a bearing and your best guess at the distance from what you can hear yourself. if you start working with those lines and extend them to 35km the margin of error becomes fairly large nevertheless, listening for contacts yourself is fun and useful