local rotator OffsetRot;
OffsetRot=Pawn.Rotation;
OfsetRot.Yaw+=90*DegToUnrRot;
DrawDebugSphere ( pawn.location + (22 * Vector(OffsetRot) ) , 2, 10, 255, 255, 255, true);
Should do it. Swap the + for a - if it’s not oriented correctly.
UnrealScript Expressions & Operators
Using Rotators in UnrealScript