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Old 08-28-2010, 05:57 PM   #1
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Default Realism- and gameplay-related hardcode fixes for SH3.EXE

Realism- and Gameplay-related hardcode fixes for SH3.EXE
-- The inofficial Patch v1.6 for Silent Hunter 3 --

Stable version:V16B1
Date of this post: May. 23th 2012

Here I present my inofficial hardcode patch for the Silent Hunter 3 executable. Due to copyright issues and in order to prevent illegal software duplication, I cannot share the patched sh3.exe - I can only offer a Patch-Kit for you to patch the executable by yourself. This makes sure that only a legal owner of the software can use these fixes.


V16B1-Readme in ENGLISH can be found here:

V16B1-Dokumentation in DEUTSCH guggsdu hier:

V16B1-Patch-Kit (including Readme) can be found here:

Hardcode-Fixes Overview

This in only a very brief overview about the Hardcode Fixes. Details and installation instructions can be found in the Readme (see above!). Due to Stieblers cool OptionsSelector tool, most of the Fixes can individually switched ON/OFF. Even the 4GB-patch can be applied with his Selector.

1. Realistic Repair Times.
Repair times of all U-boat equipment take 60 times longer than before. The factor of 60 is user-adjustable.

2. Inaccurate range-estimations
Inaccurate range estimations for WatchOfficer (->Nearest visual contact) and WeaponsOfficer (-> Solution to target). No gods-eye firing solutions anymore. Before this mod: "Range: 8932m, Herr Kaleun". Now: "Range: 9000m, Herr Kaleun".

3. Snorkel-Fix
Speed restriction when snorkelling - wind speed dependent!

4. Periscope-Fix
Periscopes nearly useless for higher speeds, since blur effect simulates periscopes vibrations. At higher speeds, periscopes are moved down automatically.

5. Hydrophone-Fix
Hydrophones useless when diesels are working. When snorkelling, you must stop diesels in order to use hydrophones. Otherwise you'll hear nothing. No sound contact reports when diesels are working.

6. External torpedo reload fix
  • No reload of external torpedoes possible during bad weather.
  • Speed restriction to "slow" during external reload.
  • No diving possible during reload of external torpedoes.
7. Internal torpedo reload fix
No reload of internal torpedoes during storm and when surfaced. During storm one has to dive below 16m in order to reload internal torpedoes.

8. "Crash dive blues"-Bugfix (by h.sie and Stiebler)
From now on, you don't lose control over the sub anymore if you interrupt a crash dive before the sub has reached its designated crash dive depth.

9. Watch Officer automatically moves to bridge when surfacing

The lazy watch officer now automatically moves to the bridge when surfacing.

10. Fog warning
During high time compression (TC) it can happen that suddenly heavy fog occurs (or disappears), but the player doesn't even notice it and so he won't be able to act according to that new situation. This fix reduces TC>16 to TC=16 whenever fog occurs or disappears in order to warn the player. Additionally, the watch officer reports "fog sighted" resp. "fog disappearing".

11. Oxygen-Supply - by LGN1 (idea) and h.sie (programming)
So far, SH3 models a 100% renewable oxygen (O2) supply. That means: After a long period of diving, say 40 hours, it was sufficient to surface and after that the Uboat was able to dive for 40 hours again and again. With this fix, O2 is divided into two parts: A renewable part and a non-renewable part. The renewable part is the O2 in the air of the Uboat. This part is sufficient for a diving period of about 5-7 hours. During this time the LI informs you about the O2 content of the air, starting at the normal value 21% and slowly decreasing to the critical value of 17%. At 17%, the LI automatically starts to add O2 from the oxygen-supply (contained in pressure bottles). This botteled O2 supply is sufficient for a long diving period of about 30 - 100 hours (depending on Uboat type), but that O2-supply is non-renewable! That means: It is not filled up when surfacing. Only the O2 in the air is restored to the normal value of 21% when surfacing. From now on the Player has to act economically regarding O2 supply, what adds a new strategical component to the game.

12. U-Tanker Mod - by Stiebler and h.sie
Everyone complains that, when you dock at a U-tanker in mid-ocean, you lose all your current renown/tonnage for medal purposes, you get a full refuelling, full repairs, full torpedo load-out and you lose the patrol grid which BdU ordered. No longer! With this Fix, you get only 1-4 air torpedoes, you retain the patrol grid details, you receive some repairs to your hull-integrity (but not to equipment) and you receive a fuel upgrade, of up to 30% of the full capacity.

13. BDU-Messages Mod

Instead of the monotonic 2-3 standard BDU responses to status reports, there are now 28 different messages the BDU will send, depending on your tonnage sunk, fuel supply, hull damage, remaining torpedoes.

14. Radar Fix

Radar automatically switches back to ON state, when it has been switched OFF in high waves. Additionally, now the default state is OFF when a game is loaded.

15. WarNews - by Stiebler and h.sie
TC doesn't drop down to 1 when a radio message is received.

16. Wolfpack Mod (!!!) - by h.sie (programming) and LGN1 (idea)
When you find a convoy and send a contact report, it can now happen that BDU orders to shadow the convoy and send contact reports every hour, until a wolfpack consisting of AI-Uboats has arrived and collectively attack the convoy.

17. Torpedo Failure Fix - by h.sie (programming) and LGN1 (failure model)
Models higher dud rates during the torpedo crisis until 1942, and also models duds resulting from too shallow torpedo depth settings.

18. Night Vision Fix - by Makman94, Rubini and h.sie (programming)
Reduced visible range at night.

19. Diesel Damages Fix
Risk of random diesel damages when agonizing diesels with flank speed.

20. Bad Weather Fix
Shortened time periods with heavy fog.

21. Collision Damage Fix
Enlarged damage to the Uboats pressure hull when rammed by surface ship (e.g. escort).

22. Battery Discharge Fix
No movement anymore when submerged and battery empty.

23. SalvoSelectorSwitch Bugfix
Little bugfix for Salvo selector

Compatibility with Supermods:

1) GWX: Yes.
2) NYGM: Yes - except for the longer repair times fix.
3) LSH: Not tested yet, but should work.
4) WAC: Not tested yet. Should work, if you use stock repair times instead of LRT.
5) CCom: Not tested yet, but should work.

Additional Notes:

1) Don't use any of the older LRT (Longer Repair Times) or LLRT (Little Longer Repair Times) mod.

2) Do not load save-games produced with an older version of the patched exe. I suggest to patch only when you start a new career.

3) This patch adds code to sh3.exe. Some Antivirus-Programs maybe don't like this.

4) The patcher will remove the copy protection of your sh3.exe. Since this is not legal, you must not use this patcher if you have a copy-protected version.


Original first post:
Finally, I found out where in the allocated memory sh3.exe stores the amount of damage of all the uboat compartments and equipments and, much more important, I also found the assembler routines which modify the damage amount. So I was able to change the damage status, repair times and flooding level of abitrary compartments and equipments during gameplay using an little external program! For example, I set a certain 32 Bit Floating-Point value to 1.0 and immediately I heard "Periscope destroyed, captain". Setting it back to 0.0 completely repairs the periscope.
I am lightly optimistic, that realistic repair times AND realistic flooding behaviour can be done with a little assembler code. Hope I can solve the mentioned problem.
My Mediafire page:

Last edited by h.sie; 05-23-2012 at 02:08 AM. Reason: status change
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