SEAVIEW ... THERE WAS A GREAT SUBMARINE.
Welcome aboard.
I remember those commodore days as well.
Like they said all stop, surfaced and then you will get the dialogue box.
You should make sure you have the version 1.5 of the game. This way you get to use the best mods. The community has done a great work in making mods that make the immersion more realistic.
Trigger Maru Overhaul, Run Silent Run Deep, Operation Monsun, Real Fleet Boats just to name a few are mods that greatly enhance the game play for skippers who want to add more realism to it.
There is no manually have to change files for the mods. They are activated by a small program called JSGME.
This way you can add and subtract mods easily.
Do a search for these mods and more. TMO adds a more realistic boat, Run Silent Run Deep adds a few more tweaks to the boat but a huge boost in historic traffic and naval battles. Like Kurita's Center Force coming up the San Bernardino straights. Real Fleet Boat make the boat more realistic as well. Operation Monsun is great for playing on the German side if you want to add some realism to it.
There are many mods that do a great many thing. Some work with each other and some do not. Some have special version like RFB+RSRD and TMO+RSRD so that they work together.
Improved Ships Physics 2.15 adds a huge realistic movement to boat concerning its attitude and dynamics in the sea itself. If the waves are slapping at you pretty hard it will move the boat around and off course just like it would in real life.
ISP has version for RFB, TMO and combinations of them.
If you run mods and have an issue please post your game version as well as the mods you run under JSGME. This will help facilitate quicker and more accurate response to trouble shooting issues. A mod list posted under JSMGE would look like this:
Generic Mod Enabler - v2.6.0.157
[Z:\Silent-Hunter4\MODS] (Z being the drive I have the game installed onto.)
1_TriggerMaru_Overhaul_2-5
1_TMO_25_small_patch
RSRDC_TMO_V502
RSRDC_V5xx_Patch1
Improved Ship Physics 2.6_TMO_RSRDC
TMO_Visuals_for_RSRDC
Fixed_CD_sonar_RSRDC
Classe_Balao_CamoTri
Pacific Sound Mod
Nav Map Make-Over v2.1
NMMO Airbase Add-on
NMMO v2.1 Patch 1 with AB
NMMO Maps Add-on
NMMO Pre Pearl Harbor Career Start Add-on
NMMO Reverse Ocean Colors Add-on
Less Plankton 1.2