I've downloaded the mod and the readme file says the following:
"This is not a new MOD, but rather a simplified version of Trigger Maru Overhauled 2.5
It is meant for the younger or casual player and was intended as a middle step between the stock game and TMO 2.5. It is only intended for use with Silent Hunter IV patched to 1.5 or the Gold edition. As many as possible of the features of TMO have been left in place, the improved graphics, the command structure and all of the fun changes made by TMO over the stock game.
Here are some of the ways it differs from TMO:
The boxes, tails and ship outlines on the navigation map are like stock.
The Nomograph is gone.
The Next/Previous Unit keys, < > are enabled.
The enemy sensors are toned down a bit. Watch it, they are still very dangerous.
The Thermal Layer is very strong. If you are under the layer you can run right under an escort at 1/3 ahead on Silent Running and they may detect something, but they will not be able to locate you well enough to attack. The Thermal Layer is your best friend.
The Gramophone icon has been replaced by a ship draft chart. The buttons to work the Gramophone are on the bottom right corner of the chart.
The clock is a gold 1939 Hamilton, because I like it.
The deck gun loads in 4 seconds.
The torpedoes are very reliable during the early war years and get even better after mid 1943. If you want to change back to the poorly performing torpedoes that were in use during the early war years, you can enable the Historic Torpedoes MOD in the Support Folder/Optonal MODs.
The Sub underwater marker is back, sort of. It has been replaced by the wTw logo. There are MODs to remove the marker or change it back to stock in the Support Folder/Optional MODs
The Captains desk photo is the iconic Betty Grable pin-up pic, again becuase I like it."
I hope this helped...
