UBOAT Calculator

Multiple Target Synchronised Detonation Calculator

• All values must be accurate at the time of firing the first torpedo (and it won't necessarily be at Target 1, depending on the solution). Do not change them after you begin.
• Remain stationary until you have fired all the necessary torpedoes.
• There may be some small inaccuracies at sharp angles, as this currently doesn't account for torpedo gyro or the limited firing arcs of the sub itself. Nor is there any compensation for stern vs bow shots.
• If you enter values for a target that cannot be solved with the same detonation time as the other targets, it will be excluded from the results. You can try changing torpedo speeds to fix it, otherwise reposition or choose a different target.
• Depending on your settings, TDC management, whether you lock onto targets, and difficulty level you may need to manually update distance & AOB before firing on targets 2-5. I have included the expected target distance & AOB to use at the time of firing just in case you need it.
• If you are measuring distances from the map, there is ~99m margin of error once distances go beyond 1000m/1km due to the game rounding values to one decimal place. If you wish to be more precise, use the Ship Distance Calculator on this page, or the stadimeter in the game.
  Or, use the compass:
• Draw a circle from your sub to within 1000m of the target, trying to make it as close to an exact km distance as possible.
• Then draw a circle from the target until it touches the first circle.
• Add the two radii values together and you should have a pretty accurate distance.

Pro tip: It's a lot easier if you pause and measure them all right before you fire the first torpedo.

Target #	Torpedo Speed	Distance to Target (m)	Target Speed (kn)	AOB (deg)
Target 1	24kn 30kn 40kn 44kn
Target 2	24kn 30kn 40kn 44kn
Target 3	24kn 30kn 40kn 44kn
Target 4	24kn 30kn 40kn 44kn
Target 5	24kn 30kn 40kn 44kn

Please first enter all values for each target that requires a solution.

Speed from Bearing & Distance Calculator

Enter 2 visual bearings of your target, the distance of the target at each bearing, and the elapsed time between bearings to estimate the target ship speed.
You can do it whilst remaining stationary, or you can do it while moving, but you must maintain a constant course to make the calculations work.

• If you are moving, keep the target on the same side during the exercise. For example, don't cut across its course or let it move from your port side to your starboard side. The calculator can't account for that.
• If you are moving, not only will you need to maintain a constant course, you will need to know how far you have moved between bearing readings. You can use the map to measure it (mark your position when taking bearings), or you can use the Distance Travelled at Speed Calculator above.

First bearing (deg):   First bearing distance (m):

Second bearing (deg):   Second bearing distance (m):

Time between bearings (s): Distance sub moved (m) [optional]:

Please enter values for bearings, distances and time.