I would just like to point out that Adams reference to the Condor wasn't a close call situation! We were some 10 miles out and it had became obvious that we were on course for close encounter after about 3 miles of travelling/monitoring. At about 1.5 miles the condor made a small but clear course correction. At about half a mile I would have taken action, without any real issue.
Mid channel in and around the shipping lanes I will make an obvious course correction to pass astern of any crossing ship as soon as it becomes apparant that we are converging. Radar is particularily useful here!
Finally if you are ever out and forget/confused just look at your nav lights! If the other boat is looking at your green one (ie approaching from your starboard) he is stand on - you take action. If red (from port) you are stand on. Obviously at night it's even easier as you can see his lights from a long way away - once you are used to it!