Screw sounds: closing/moving away

Maui · 03-20-06, 12:51 AM

The sonar operator is able to tell you if a ship is moving away, closer, or keeping a constant distance. But listening to the hydrophone myself, I am not able to tell the difference. Is it possible to be able to do so? What would the difference in sound be? Is it modeled in the game?

scandium · 03-20-06, 01:00 AM

There's a hydrophone tutorial you can download in the download section. To answer your question though, its not only possible to tell if the ship is moving closer or away with the hydrophone, but to use it determine the target's course precisely enough for a blind underwater torpedo shot. Haven't personally tried it though (the tutorial that is).

Maui · 03-20-06, 01:29 AM

Awesome... thanks, scandium.

Though I did just download it and the pdf doesn't mention anything about identifying whether a target is closing or moving away. I'll try the tutorial, though, maybe they mention it in there.

scandium · 03-20-06, 03:09 AM

No prob. Its rather amazing how inept the hydrophone operators can be (even qualified Chief Warrant Officer NCOs): I've sat at 20 m depth with the engines stopped, listening to the screws of an approaching ship only to have my hydrophone operator snap "No Sound Contact!" when I pass the headphones back... its enough to make you want to slap him silly.

mike_espo · 03-20-06, 09:46 AM

Quote:

Originally Posted by scandium

No prob. Its rather amazing how inept the hydrophone operators can be (even qualified Chief Warrant Officer NCOs): I've sat at 20 m depth with the engines stopped, listening to the screws of an approaching ship only to have my hydrophone operator snap "No Sound Contact!" when I pass the headphones back... its enough to make you want to slap him silly.

I know your pain!

I guess the radioman qual is worthless....

Oberon · 03-20-06, 10:43 AM

scandium · 03-20-06, 11:32 AM

Man you made my day, I laughed so hard I damn near fell off my chair

reggie_mcfly · 03-20-06, 02:13 PM

That was inspired. Loved it.

capt-jones · 03-20-06, 03:20 PM

one picture is worth a thousand words :rotfl: funniest thing ive seen since some one put him in one of the torpedo tubes

i remember that one

Dowly · 03-20-06, 03:24 PM

Oberon strikes again! :rotfl:

Anyone here though that you can hear if the contact is coming closer when the sound gets louder?

The AI sonar operator just has better hearing, so he can tell it in a split second.

03-20-06, 03:33 PM

If I was the captain, I would assign these radiomans into the next u-Boat trip to La Spezia

Dowly · 03-20-06, 03:52 PM

Quote:

Originally Posted by JonZ

If I was the captain, I would assign these radiomans into the next u-Boat trip to La Spezia

La Spezia is THE place to be! CanÂ´t wait for WaW2, to get back to Med!

Type XXIII · 03-20-06, 04:38 PM

Quote:

Originally Posted by Dowly

Oberon strikes again! :rotfl:

Anyone here though that you can hear if the contact is coming closer when the sound gets louder?

The AI sonar operator just has better hearing, so he can tell it in a split second.

Well, in theory*, you can also listen carefully to the pitch and judge the contact's relative speed to you based on doppler effects. Maybe the sonar operator has a very good musical ear...

*) well, in reality the pitch differences would be minimal, since the speed of a merchant relative to the speed of sound in water is negligible. But we don't have to say that loud, do we?

DMarkwick · 03-20-06, 06:37 PM

If the screws sound clockwise, it's moving away. If they sound anti-clockwise, it's moving toward you.

kenijaru · 03-20-06, 06:42 PM

Quote:

Originally Posted by DMarkwick

If the screws sound clockwise, it's moving away. If they sound anti-clockwise, it's moving toward you.

how am i suposed to hear that?

03-20-06, 12:51 AM	#1
Maui Seaman Join Date: Mar 2006 Posts: 34 Downloads: 0 Uploads: 0	Screw sounds: closing/moving away The sonar operator is able to tell you if a ship is moving away, closer, or keeping a constant distance. But listening to the hydrophone myself, I am not able to tell the difference. Is it possible to be able to do so? What would the difference in sound be? Is it modeled in the game?

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03-20-06, 01:00 AM	#2
scandium Ace of the Deep Join Date: Mar 2006 Posts: 1,098 Downloads: 0 Uploads: 0	There's a hydrophone tutorial you can download in the download section. To answer your question though, its not only possible to tell if the ship is moving closer or away with the hydrophone, but to use it determine the target's course precisely enough for a blind underwater torpedo shot. Haven't personally tried it though (the tutorial that is).

03-20-06, 01:29 AM	#3
Maui Seaman Join Date: Mar 2006 Posts: 34 Downloads: 0 Uploads: 0	Awesome... thanks, scandium. Though I did just download it and the pdf doesn't mention anything about identifying whether a target is closing or moving away. I'll try the tutorial, though, maybe they mention it in there.

03-20-06, 03:09 AM	#4
scandium Ace of the Deep Join Date: Mar 2006 Posts: 1,098 Downloads: 0 Uploads: 0	No prob. Its rather amazing how inept the hydrophone operators can be (even qualified Chief Warrant Officer NCOs): I've sat at 20 m depth with the engines stopped, listening to the screws of an approaching ship only to have my hydrophone operator snap "No Sound Contact!" when I pass the headphones back... its enough to make you want to slap him silly.

03-20-06, 10:43 AM	#6
Oberon Lucky Jack Join Date: Jul 2002 Posts: 25,976 Downloads: 61 Uploads: 20

03-20-06, 11:32 AM	#7
scandium Ace of the Deep Join Date: Mar 2006 Posts: 1,098 Downloads: 0 Uploads: 0	Man you made my day, I laughed so hard I damn near fell off my chair

03-20-06, 02:13 PM	#8
reggie_mcfly Swabbie Join Date: Dec 2005 Posts: 5 Downloads: 1 Uploads: 0	That was inspired. Loved it.

03-20-06, 03:20 PM	#9
capt-jones Helmsman Join Date: Dec 2003 Posts: 109 Downloads: 328 Uploads: 0	one picture is worth a thousand words :rotfl: funniest thing ive seen since some one put him in one of the torpedo tubes i remember that one

03-20-06, 03:24 PM	#10
Dowly Lucky Jack Join Date: Apr 2005 Location: Finland Posts: 25,052 Downloads: 32 Uploads: 0	Oberon strikes again! :rotfl: Anyone here though that you can hear if the contact is coming closer when the sound gets louder? The AI sonar operator just has better hearing, so he can tell it in a split second.

03-20-06, 03:33 PM	#11
JonZ Stowaway Posts: n/a Downloads: Uploads:	If I was the captain, I would assign these radiomans into the next u-Boat trip to La Spezia

03-20-06, 06:37 PM	#14
DMarkwick Shore leave Join Date: Jan 2006 Posts: 70 Downloads: 0 Uploads: 0	If the screws sound clockwise, it's moving away. If they sound anti-clockwise, it's moving toward you.