Who's good at math to calculate ..

[robj250]

.. a night time attack on a convoy. Here is the situation: it is presently 1952 hrs. I just received a message that there is a convoy doing 8 kts NNE. My course is 268°. Now if I stay on my course, it will probably end up as a daylight attack because their course will cross my course if I continue on 268°. Now in all my past encounters with reported convoys, the convoy has never changed course. I have no idea what course to take with my upgraded VIIB at ahead flank to intercept them during the night. If I wait for them to cross my course they would have to travel about 263 km and I would only have to travel 100.7 km. Oh, the weather is clear and the seas are calm so I should be able to do 18 kts. Is this enough information? Is it possible for me to change to a certian course to make a night-time attack? I have no idea whether it is possible or not.