Spiess TMA (aka Four Bearings)

[3catcircus]

Originally Posted by Aquelarrefox

Interesting, but I don't think you can use with real navigation. Even with simple 4 bearing in movement you should use a 45* as much because the curve the boat did gets error. Even should be better 6 min in some cases, but depend of target speed 9 or 12 min, vs half hour is a difference.

About hydro and real navigation I have a question, maybe you know. Is possible only show hydro contract in attack map?
This idea some from the limitation from the hydro operator, add the needs of lack of position marks in map, but as attack map don't have coordinates, you should read direction and have and idea of which ship formation with out ear. Yes is a experience but you can't do all by your self, no enough time in game nor real life when you attack a convoy.

So, Spiess method works - it is just that at the speeds a uboat operates at while submerged, you will need to plan on doing an overhaul maneuver while surfaced after finding the targets true course and speed. Given that you can hear them further than they can see you, this is fine.