just found this on subsim
posted by Zuff
Hold TAB: Great for quickly assigning crew to positions without zooming around the sub trying to find them. Works in any view, as well.
Right Click: Right click on stations to get more options. For example have a crew member selected and right click on the light next to the pump. It'll show you all available colors to select from.
Tactical Map mode: When in the map and nothing else is selected you'll have three buttons at the bottom left. The farthest right one is a tactical map which is great for getting a good overview of the area you're in. Sadly no map tools work in this mode. The regular map can zoom in just as much as the tactical mode though so you can use map tools there.
Don't set off the alarm: When you need to dive but it's not urgent, drop to periscope depth first. Anything past that will set off the alarm lowering morale. After at periscope depth slowly drop your depth. It seems dropping huge increments always set off the alarm (really hope they fix this)
Target three ships at once: You can auto-calculate on three ships at once with a crew member in each the attack, observe periscopes and the hydrophone. Select the position, select a ship, and open target positions on that ship. Do the same for the other ships/positions. You can also triple up on one ship for a faster solution. I like putting three on the first ship, moving 2 to the next ship once the first ship is calculated, and moving the last one to the last ship. Once I fire the first fish at the first ship, I take its targeting crew and move him to the second ship, and so on. It's best to start at the farthest away ship so that your torps have time to reach targets without scattering the rest.
Checkpoints: See those dots on the map? Travel to them to turn them green and make them fast travel points. Great for skipping 15 minutes of mindless travel across the sea.
More O2 and better Morale under water: There are a couple of things you can do to make staying beneath the sea more bearable for your men. First is blue light to indicate silent running. This lowers O2 usage. Second is Ventilation. This extends O2 supply but at the cost of battery.
Red Light at Night: Having the red light on during the night will extend your UZO's crew sight line.
Control room light switch - Right click, it will allow you to then select what light you want on rather than cycling through them one at a time. Red light at night not only improves visibility through the UZO but also visibility of the naked eye slightly (most every click spot aboard the boat has this feature)
Stuck officer work around - if you encounter an item such as the ballast valve that you are unable to operate because of the red text indicating that someone else is using the item, when clearly nobody is (bug) click the evacuate compartment icon in the bottom left of the compartment, everyone will leave the room and it will clear the que for that piece of equipment. then, un-check the evacuation box, and the item will now be usable.
cant use hydrophones work around - sometimes you will find that you cannot make your radio operator switch to the hydrophones once you have gone under water. if this happens, hold TAB key and select the radio officer, on the list of available actions below his icon will be the hydrophones, select those and he will move to the hydrophone station!
Torpedo solutions faster - assign the commander to the attack scope or UZO and assign him an assistant. the captain can calculate torpedo solution for one target, the assistant can calculate a solution on a second target at the same time and if you are submerged, the hydrophone operator can calculate solution on a third target giving you 3 solutions for the price of one!