anchor.diff:  BE_0BEZEE,Zeebrugge,Belgium,port
   BG_0BGBOJ,Burgas,Bulgaria,port
   BG_0BGVAR,Varna,Bulgaria,port
  +BG_0BG888,Bulgaria - other ports,Bulgaria,port
   DK_0DKAAL,Aalborg,Denmark,port
   DK_0DKARK,Ærøskøbing,Denmark,port
   DK_0DKAAR,Århus,Denmark,port
  
positive.code: EL_0GRVOL,Volos,Greece,port
  EL_0GRHYD,Ydra,Greece,port
  EL_0GRZTH,Zakynthos,Greece,port
  ES_2ESALG,Algeciras,Spain,port
  ES_2ESALC,Alicante,Spain,port
  ES_2ESLEI,Almería,Spain,port
  
negative.code: NL_0NLVLA,Vlaardingen,Netherlands,port
  NL_0NLVLI,Vlissingen,Netherlands,port
  NL_0NLZSP,Zeeland Seaports,Netherlands,port
  NL_0NL888,Netherlands - other ports,Netherlands,port
  PL_0PLGDN,Gdansk,Poland,port
  PL_0PLGDY,Gdynia,Poland,port
  PL_0PLHEL,Hel,Poland,port
  