Its good to hear how you have managed it ,I,ve got a new sub and a new crew starting from scratch so have no radar ( lost my other boat to enemy action). I found on SH5 if you pan your scope round the torpedo track follows it ,so you can fire by your bearing once you get a feeling for it. The method I used in SH4 is dead easy, you don,t need the position keeper or the TDC , you don,t need to calculate the distance. Provided the torps run straight and the target is within the torpedo range. To get the angle to fire the fish go to a position on the map where the Latitude and Longitude lines cross. Starting from the intersection draw a vertical line denoting the target speed ie 12 knots= 12miles, fix the line then move the cursor to the bottom of the line and pull it off the intersection, the distance just measured will remain the same, if you don,t do that when you come to draw your horizontal line for the torpedo speed ,it,ll drag it along . Put the speeds down and measure the angle with the protractor. It will only work of course providing you,re at right angles to the target . I do not know whether I hit 3 ships and sunk 2, or one ship got hit by 2 fish. Anyhow its 2-0 to the US navy
H