Errors in manual targeting depend of the time you have to do the solution, the distance from the target and specially on weather. If you try to get a range with the stadimeter in the middle of a storm at night with "No stabilise view" checked, you will have a hard time if the ship isn't really close. So i think that in some extreme conditions finding a solution will be really hard and if you find one it will be most of the time innacurate, and the same should apply even to a crack WO. But it's only my opinion
