[Jace11]

I was looking at some doctines for evasion of weapons, contacts etc

I found this in Actuv's rather complicated SubAvoidSub and when I looked at
it, it didn't make sense to me.

func Tactic1 {
IF RelativeBearing OwnCrs TgtBrg < 0 THEN {
OrdCrs = ( TgtBrg + 150 + rnd 30 mod 360 )
} ELSE {
OrdCrs = ( TgtBrg + 210 - rnd 30 mod 360 )
} ENDIF
BEARSOUTH
}

I checked the doctrine format document and RelativeBearing

RelativeBearing <value1> <value2> Returns the relative bearing from <value1> to <value2>

But don't relative bearings work through 360 degrees, unlike say TgTAOB which is plus / minus degrees for stb and port?

So, ignoring BEARSOUTH, doesn't this function always give an ordered course of tgt brg + 210 (plus rnd) every time... The condition will always return a positive value?

Sorry but boring, but I've seen this often in the doctrines. I think I have something wrong.

This one works well for detecting incoming torps:

( abs RelativeBearing TgtCrs ( TgtBrg + 180 mod 360 ) < 35 )

This requires the absolute value because you modulo? And could end up with a -ve number easily...?

Duh, ok i think I found my mistake OwnCrs can be greater than TgtBrg, obvious really...