[TEC] Radio depth

Bubblehead1980 · 05-06-21, 09:08 PM

Issue want to correct for forthcoming TMO update (if possible) is should be able to send contact reports at periscope depth(from what understand fleetboats could and in sim already receive messages at periscope depth) not have to go to 35 ft or so exposing sub.

Which file(s) do need to look at? Have not located them thus far.

propbeanie · 05-06-21, 09:52 PM

I've been wanting to do that also. The subs could actually "talk" deeper than PD later in the war, so I was wondering about raising the level of the 'antenna' maybe, but haven't gotten around to experimenting with it yet. I haven't looked to make certain, but I think it is tied to "radar depth", aka: "Snorkel depth", or, if modded further - aka: "Decks Awash"...

KaleunMarco · 05-07-21, 10:24 AM

I agree. I would add length to the radio antenna such that it would break the surface at whatever depth you deem appropriate.

Why not make it match the periscope length. Then you can radio from PD.

ETR3(SS) · 05-08-21, 10:51 AM

I've changed it...somehow. All I can remember is that it is not something simple or obvious.

As for the radio side of things, this is where my experience comes in. Fleet boats had the following receiving radio sets:

RAK-6: This set covers the VLF, LF, and MF radio bands from 15 kHz to 600 kHz

RAL-6: This set covers the MF and HF radio bands from 300 kHz to 23 mHz

RBH-2: This set covers the MF and HF radio bands in frequencies from 300 kHz to 1.2 mHz and 1.7 mHz to 16 mHz.

The lower frequencies (VLF,LF) would be data only in the form of morse code, while the higher frequencies (MF,HF) would be voice circuits. As such receiving radio signals while submerged would only be possible on lower frequencies, with VLF being the best being able to penetrate to a depth of 40m or 131ft.

Now the transmit side of things:

TBL-5/6/7: Can transmit voice (75kHz-600kHz, 2mhz-18mHz) and data (175kHz-600kHz, 2mHz-18mHz) in the LF, MF, and HF ranges.

And the final puzzle piece, the antenna:

Note the Transmit Antenna and the separate Receive Antenna. In order to transmit and be received, that antenna needs to be out of the water. There are of course other antennas onboard but those are for LOS comms, basically short range.

propbeanie · 05-10-21, 12:32 PM

Surely it's a sim file setting... at least, I ~hope~ it is... lol - thanks for the info ETR3(SS)!

KaleunMarco · 05-10-21, 06:20 PM

Quote:

Originally Posted by propbeanie

Surely it's a sim file setting... at least, I ~hope~ it is... lol - thanks for the info ETR3(SS)!

the antenna length is in a sim file. C:\Ubisoft\FOTRSU 1.46\Data\Library\USSubParts\Sensors.sim

and stop calling me Surely.
(too easy to pass up)

05-06-21, 09:08 PM	#1
Bubblehead1980 Navy Seal Join Date: Apr 2009 Location: Florida USA Posts: 6,922 Downloads: 550 Uploads: 42	Radio depth Issue want to correct for forthcoming TMO update (if possible) is should be able to send contact reports at periscope depth(from what understand fleetboats could and in sim already receive messages at periscope depth) not have to go to 35 ft or so exposing sub. Which file(s) do need to look at? Have not located them thus far.

05-06-21, 09:52 PM	#2
propbeanie CTD - it's not just a job Join Date: May 2016 Location: One hour from Music City USA! Posts: 9,780 Downloads: 444 Uploads: 2	I've been wanting to do that also. The subs could actually "talk" deeper than PD later in the war, so I was wondering about raising the level of the 'antenna' maybe, but haven't gotten around to experimenting with it yet. I haven't looked to make certain, but I think it is tied to "radar depth", aka: "Snorkel depth", or, if modded further - aka: "Decks Awash"... __________________ "...and bollocks to the naysayer/s" - Jimbuna

05-07-21, 10:24 AM	#3
KaleunMarco Silent Hunter Join Date: Sep 2007 Location: Chicago area, which is more dangerous than Omaha Beach. Posts: 3,949 Downloads: 437 Uploads: 27	I agree. I would add length to the radio antenna such that it would break the surface at whatever depth you deem appropriate. Why not make it match the periscope length. Then you can radio from PD. __________________ there are only two things in the world: submarines and targets. Fortis et stabilis et fidelis, semper ------------------------------------------------------------ Silent Hunter 4 1.5 Gold Edition on CDROM LAA enabled Dell XPS with 32 GB Ram running Win10

05-08-21, 10:51 AM	#4
ETR3(SS) Ocean Warrior Join Date: Dec 2007 Location: Between test depth and periscope depth Posts: 3,021 Downloads: 175 Uploads: 16	I've changed it...somehow. All I can remember is that it is not something simple or obvious. As for the radio side of things, this is where my experience comes in. Fleet boats had the following receiving radio sets: RAK-6: This set covers the VLF, LF, and MF radio bands from 15 kHz to 600 kHz RAL-6: This set covers the MF and HF radio bands from 300 kHz to 23 mHz RBH-2: This set covers the MF and HF radio bands in frequencies from 300 kHz to 1.2 mHz and 1.7 mHz to 16 mHz. The lower frequencies (VLF,LF) would be data only in the form of morse code, while the higher frequencies (MF,HF) would be voice circuits. As such receiving radio signals while submerged would only be possible on lower frequencies, with VLF being the best being able to penetrate to a depth of 40m or 131ft. Now the transmit side of things: TBL-5/6/7: Can transmit voice (75kHz-600kHz, 2mhz-18mHz) and data (175kHz-600kHz, 2mHz-18mHz) in the LF, MF, and HF ranges. And the final puzzle piece, the antenna: Note the Transmit Antenna and the separate Receive Antenna. In order to transmit and be received, that antenna needs to be out of the water. There are of course other antennas onboard but those are for LOS comms, basically short range. __________________ USS Kentucky SSBN 737 (G) Comms Div 2003-2006 Qualified 19 November 03 Yes I was really on a submarine.

05-10-21, 12:32 PM	#5
propbeanie CTD - it's not just a job Join Date: May 2016 Location: One hour from Music City USA! Posts: 9,780 Downloads: 444 Uploads: 2	Surely it's a sim file setting... at least, I ~hope~ it is... lol - thanks for the info ETR3(SS)! __________________ "...and bollocks to the naysayer/s" - Jimbuna