i think this post was started before GWX2 was released... In the previous version of GWX the contact marks still had "tails"... they have been removed in GWX2 so this "newbish" method no longer works.
the next best thing is to observe the convoy at long range and mark their position once per hour for two hours. Once you have two points you can use the ruler tool to connect the two points. Once this is done you can extend the ruler line out to about 100 KM and this is a course line you can expect to encounter this convoy on again later.
now... go beyond visual range and proceed at ahead flank to some point on this line many miles ahead of the convoy and wait for them to catch up to you.
one small problem however that you have to be aware of... GWX convoys occasionally change course without warning, so you may sit and wait for a convoy that will never get there.
periodical hydrophone checks are important for this reason.
In fact the original post and its 3 subsequent replies are almost a FULL YEAR OLD
my advice to Joe Armstrong would be to stop going back in the forum 75 pages and digging up old garbage.
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