2950 PRINT "TORPEDO TRACK:"
2960 LET X=X+X[1]
2970 LET Y=Y+X[2]
2980 IF X<.5 OR X >= 8.5 OR Y<.5 OR Y >= 8.5 THEN 3420
2990 LET V[4]=X
2991 LET V[5]=Y
2992 GOSUB 9000
Becomes...
_2950: Console.WriteLine("TORPEDO TRACK:");
_2960: X = X + _X[1];
_2970: Y = Y + _X[2];
_2980: if (X < .5 || X >= 8.5 || Y < .5 || Y >= 8.5) goto _3420;
_2990: _V[4] = X;
_2991: _V[5] = Y;
_2992: _9000();