[jasonsagert]

In RL radar detection gear was capable of detecting radar signals at a long enough range that the ship emitting the signal wouldn't be capable of detecting the craft using the detection gear. This, of course, depends on the radar and the radar detection gear used.

Depending on what mod you use, this is modeled. I use GWX but I also use a radar detection mod by Steibler. I'm not sure if those changes were implimented in GWX, but I really like them and use it anyway.

I know in the stock SH3 the radar detection equiqment was really under "powered". Here is the read me from Steibler's mod:

"""""""""The U-boat radar detectors are woefully inadequate in the original SH3 package, yet are of critical importance to help avoid deadly night attacks by enemy aircraft (or by destroyers in fog). In principle, a radar detector should have at least double the range of the radar emitter, but this assumes equal technology for the Allied and German receiving equipment. In practice, the German equipment was inferior, at any rate earlier in the war and, especially, for early Naxos.

Jungman attempted a fix in July 2005, which largely solved the problem. However, his ranges for the radar detectors were incorrect, and the fix required installation of his file 'sensors.dat', which was a problem if you were using another modified version of sensors.dat provided for a different purpose. For example, all versions of RUb up to and including 1.45 lack the improved radar detectors.

Therefore, I've created this program 'radar_detection.exe' which provides (approximately) accurate ranges for the radar detectors, and can be used to modify any existing version of 'sensors.dat'. Please note: the lower your time compression, the more effective the radar detectors.

INSTALLATION:
1. Unzip the file 'radar_detection.zip' that you downloaded.
It contains the files 'radar_detection.exe' and 'radar_detection.txt' (this readme file).
2. You *must* place the -exe file in the same folder as the folder which contains 'sensors.dat'. By default, this will be in C:\program files\ubisoft\silenthunterIII\data\library\. The text file can go anywhere (best in the documentation folder, C:\program files\ubisoft\silenthunterIII\documentation).
3. Go to Windows Explorer and double click on 'radar_detection.exe'. It should run itself with a progress report. Press 'Return' to exit. The program has updated your sensors.dat file, and placed a backup copy 'sensorsoriginal.dat' in the same folder. [Note: rename 'sensorsoriginal.dat' immediately, because if you run radar_detection.exe a second time, sensorsoriginal.dat will be replaced by a copy of the modified file.]
4. If you use the JSGME utility to move modified files around, remember to use 'radar_detection.exe' on the sensors.dat file in your MODS folder, before moving them into the DATA folder with JSGME.

USAGE:
This product is provided gratis on an 'as-is' basis. No warranty is provided as to its usefulness, except that the file 'radar_detection.exe' is guaranteed to contain no code that will *deliberately* harm your computer.

THE RADAR DETECTORS:
Allied radar technology far outstripped that of the Germans, who were always struggling to keep up with new inventions.

1. FuMB1 METOX. (Introduced August 1942. Later, less crude, version called 'BALI'.)
Detected radar transmissions around the 150 cm wavelength. (BALI: 75-300 cm.)
Could detect approaching aircraft at up to 50 km range.
Original SH3: Metox range = 4(!) km. (Consequently destroyers see you before you see them, and there is no time to dive before an approaching aircraft.)
This fix: Metox range = 30 km (low value, to compensate for horizon of ship-borne radar).

2. FuMB9 WANZE-1 and WANZE-2. (Introduced summer/autumn 1943.)
By now the Allies were using low wavelength (10 cm) radars to locate U-boats, which Metox could not detect. NAXOS (see below) was intended to detect these radiations but, unfortunately for the Germans, it was very insensitive and thus had low range. Consequently, the Germans believed that the Allies were using receiver radiations from Metox to locate U-boats. This resulted in WANZE-1 and WANZE-2 being tried. WANZE-1 radiated less, and WANZE-2 hardly at all. Both effective in the 75-300 cm wavelengths.
Original SH3: WANZE is not included.

3. FuMB10 BORKUM. (Introduced late 1943)
An attempt to improve on WANZE for medium wavelengths, BORKUM itself gave no radiations at all, and consequently (from contemporary technology) had a lesser range than Metox. It could search down to 20 cm wavelengths.
Original SH3: Borkum range = 5 km.
This fix: Borkum range = 20 km.
[Note - SH3's documentation wrongly suggests that Borkum searched lower wavelengths. Is this an error in the documentation or in the implementation?]

4. FuMB7 NAXOS (Introduced June 1943. Re-introduced November 1943.)
When it became apparent that WANZE didn't help either, the original poor performance of NAXOS (ca. 8 km) was greatly improved by allowing manual rotation of a uni-directional aerial (previously a fixed multi-directional aerial). The new NAXOS searched the 9-12 cm wavelengths, with a range of up to 20 km. By November 1943, the new NAXOS was being distributed to U-boats.
Original SH3: Naxos range = 7.5 km.
This fix: Naxos range = 15 km - be careful!

5. FLIEGE. (Introduced Spring 1944.)
Much improved NAXOS. Searched wavelengths 8-12 cm, and was manually rotated by the operator, resulting in detection ranges of up to 60 km.
Original SH3: Not implemented.

6. MÜCKE. (Introduced April 1944.)
Covered the low wavelengths of 2-4 cm that would later (sic) be introduced by the Allies. Range was 40-60 km.
Original SH3: Not implemented.

7. FuMB26 TUNIS. (Introduced May 1944.)
Combining FLIEGE and MÜCKE, range was up to 70 km.
Original SH3: Tunis range = 10 km.
This fix: Tunis range = 30 km (horizon effect, for detecting warships).

8. FuMB35 ATHOS. (Introduced early 1945.)
Effectively an improved TUNIS.
Original SH3: Not implemented.

9. FuMB37 LEROS. (Introduced 1945.)
A combination of ATHOS and the earlier BALI, thus covering all radar wavelengths used by the Allies and reducing the number of aerials positioned around the U-boat.
Original SH3: Not implemented.

SWEEP-TIMES:
These have also been 'improved', in the narrow sense of having been given faster sweeps. I don't know the authentic sweep times, but late Naxos must have been slow with manual sweeping.

HOW SH3 USES THE RADAR DETECTORS:
The radar detectors are used sequentially in SH3. That is, when you install a later model, it automatically receives in addition the characteristics of ALL the older models. Do NOT attempt to install an older radar detector after installing a later version - SH3 will think that you have only the old version!

PROBLEM: I'VE INSTALLED THIS FIX AND I STILL GET ATTACKED AT NIGHT/THICK FOG WITHOUT RADAR WARNING!
Almost certainly, your radar detector has become obsolete. The Allies have started to use a new form of radar. When possible, update with the latest radar detector in base. [This problem really happened all the time during the U-boat war, leaving the U-boat crews extremely nervous about being surfaced. They never knew what might be coming next - without warning. The situation was not helped by repeated claims and counter-claims that Allied aircraft might be homing-in on U-boat radar receivers when switched on.] Another problem may be that Allied ships/aircraft are homing-in onto your active search radar, if installed. Be sure to switch off active radar when not required (use the radio officer icon).

SENSORS.CFG:
In order to provide some compensation for time compression, you might like to alter manually "Radar Warning range factor=1" to "Radar Warning range factor=2". This can be found in the file 'Data\cfg\sensors.cfg'. Note also that the effectiveness of the radar detectors depends on the crew's efficiency (or 'tiredness'). If you are playing with RUb 1.45 (latest, at this date), you might also consider changing the line "Radar Warning uses crew efficiency=true" to "Radar Warning uses crew efficiency=false". This compensates for the fact that 'stressed' crew members cannot be rested with RUb 1.45.

EXAMPLES OF ACTUAL USE (Naxos has the shortest range):
SH3 with patch 1.4b: Aircraft attack in May 1944 was detected by Naxos one game minute before the 'detection indicator' turned red, indicating that the aircraft had seen the U-boat; a further two minutes elapsed before the aircraft was in visual range (light fog). This is easily enough time in which to dive.
RUb 1.45: Naxos gave 1-2 game minutes warning of aircraft attacks in June 1944. Proximity to large convoy resulted in repeated radar detections from the convoy escorts without the U-boat being 'red-lighted' on the 'detection indicator'."""""""""

Again, I do not know if these changes were made in GWX, but this mod is compatible with any other mod (it uses a simple .exe to change the values).

J