SSP types description

[Delareon]

Hey folks,
im searching for a description about the different SSP types.
Something like that from the ASW Training Mission from Molon Labe:

A surface duct means that you will get very long detection ranges when you and a contact are above the layer, comparatively short detection ranges for when you and a contact are below the layer, and very short detection ranges for when you and the contact are on opposite sides of the layer.

Can someone point me to the right direction?

[Pisces]

These are classic introductionary documents for any simulater subdriver:

http://www.subguru.com/missions/SCHQ_TACMAN_PDF.zip

http://www.subguru.com/BluebookR20.zip

But this is site with a more official explanation. The above is based on what is modled in the various sub games (mostly 688i and Subcommand)

See link in Bilge Rat's message below. I forgot to include it.

Look what Google dug up: From our very own Dr Sid:

http://subsim.questions.cz/sopro/doc/sopro.html

His tool to make those neat soundray patterns is here:

http://subsim.questions.cz/sopro/sopro.1.9.zip

[Delareon]

Thank you very much Pisces, thats what i was looking for.

[Bilge_Rat]

here is a good basic explanation:


http://www.fas.org/man/dod-101/navy/...P/snr_prop.htm

1. negative gradient: sound curves downward.




2. positive gradient: sound curves upward.



3. effect of a layer:

[Dr.Sid]

So google finally noticed ? Not that I was much helpfull. I should make some proper page for it.

Anyway .. if you need it for use in DW, you also need to know how all this is implemented in DW:

http://www.subsim.com/radioroom/showthread.php?t=117814

[Pisces]

Originally Posted by Bilge_Rat

here is a good basic explanation:


http://www.fas.org/man/dod-101/navy/...P/snr_prop.htm

Darn!, I meant to include the link. But somehow forgot at the last minute. Thanks Bilge Rat

[Molon Labe]

Originally Posted by Delareon

Hey folks,
im searching for a description about the different SSP types.
Something like that from the ASW Training Mission from Molon Labe:



Can someone point me to the right direction?

The basic basic ML-version explanation of the other two types would be:

CZ: Very long detection ranges on both sides of the layer. The top layer is still the same surface duct from the Surface Duct SSP type, the bottom is a "sound channel" unique to the CZ SSP type, and I think the sound channel is a bit stronger than the surface duct, but it's close. This CZ SSP type also produces convergence zone contacts. This takes the form of concentric bands around a contact, within which you will receive a stronger signal from that contact. These bands occur at 30nm intervals are are probably about 1nm wide.

BL: No layer. Detection ranges in this SSP type vary mostly depending on Bottom Type. Rock bottom type will cause long detection ranges; almost has high as a duct. Mud and Sand result in very short detection ranges (no, there really isn't a middle ground), with Sand being slightly worse IIRC (not much of a difference).

[Delareon]

Wow, thank you again for all that information.
I will read that stuff and maybe came again with a couple of questions