anchor.diff:  656,D,Friend,SFSPXMT-------,S F S P XM T -- -- -- -,1.X.4.3.1.4 ,TUG,POINT,
   657,D,Friend,SFSPXMF--------,S F S P XM F- -- -- -- -,1.X.4.3.1.5 ,FERRY,POINT,
   658,D,Friend,SFSPXMP--------,S F S P XM P- -- -- -- -,1.X.4.3.1.6 ,PASSENGER,POINT,
  -659,D,Friend,SFSPXMH--------,S F S P XM H- -- -- -- -,1.X.4.3.1.7 ,HAZARDOUS MATERIALS,POINT,
  +659,D,Friend,SFSPXMHZ-------,S F S P XM HZ -- -- -- -,1.X.4.3.1.7 ,HAZARDOUS MATERIALS,POINT,
   660,D,Friend,SFSPXMD-------,S F S P XM D -- -- -- -,1.X.4.3.1.8 ,DREDGE,POINT,
   661,D,Friend,SFSPXF---------,S F S P XF -- -- -- -- -,1.X.4.3.2 ,FISHING,POINT,
  -662,D,Friend,SFSPXFDF-------,S F S P XF DF -- -- -- -,1.X.4.3.2.1 ,DRIFTER,POINT,
  -663,D,Friend,SFSPXFDR-------,S F S P XF DR -- -- -- -,1.X.4.3.2.2 ,DREDGE,POINT,
  -664,D,Friend,SFSPXFTR-------,S F S P XF TR -- -- -- -,1.X.4.3.2.3 ,TRAWLER,POINT,
  +662,D,Friend,SFSPXMDF-------,S F S P XM DF -- -- -- -,1.X.4.3.2.1 ,DRIFTER,POINT,
  +664,D,Friend,SFSPXMTR-------,S F S P XM TR -- -- -- -,1.X.4.3.2.2 ,TRAWLER,POINT,
   665,D,Friend,SFSPXR---------,S F S P XR -- -- -- -- -,1.X.4.3.3 ,LEISURE CRAFT,POINT,
   666,D,Friend,SFSPXL---------,S F S P XL -- -- -- -- -,1.X.4.3.4 ,LAW ENFORCEMENT VESSEL,POINT,
   667,D,Friend,SFSPXH---------,S F S P XH -- -- -- -- -,1.X.4.3.5 ,HOVERCRAFT,POINT,
   668,D,Friend,SFSPO----------,S F S P O- -- -- -- -- -,1.X.4.4 ,OWN TRACK,POINT,
  -669,D,Friend,SFSPE----------,S F S P E- -- -- -- -- -,1.X.4.5 ,EMERGENCY,POINT,
  +669,D,Friend,SFSPE----------,S F S P E- -- -- -- -- -,1.X.4.5 ,EMERGENCY,NO_SYMBOL,
   670,D,Friend,SFSPED---------,S F S P ED -- -- -- -- -,1.X.4.5.1 ,DITCHED AIRCRAFT,POINT,
   671,D,Friend,SFSPEP---------,S F S P EP -- -- -- -- -,1.X.4.5.2 ,PERSON IN WATER,POINT,
   672,D,Friend,SFSPEV---------,S F S P EV -- -- -- -- -,1.X.4.5.3 ,DISTRESSED VESSEL,POINT,
  -673,D,Friend,SFSPZ----------,S F S P Z- -- -- -- -- -,1.X.4.6 ,HAZARD,POINT,
  +673,D,Friend,SFSPZ----------,S F S P Z- -- -- -- -- -,1.X.4.6 ,HAZARD,NO_SYMBOL,
   674,D,Friend,SFSPZM---------,S F S P ZM -- -- -- -- -,1.X.4.6.1 ,SEA MINELIKE,POINT,
   675,D,Friend,SFSPZN---------,S F S P ZN -- -- -- -- -,1.X.4.6.2 ,NAVIGATIONAL,POINT,
   676,D,Friend,SFSPZI---------,S F S P ZI -- -- -- -- -,1.X.4.6.3 ,ICEBERG,POINT,
  
positive.code: 464,D,Friend,SFGPUH---------,S F G P UH -- -- -- -- -,1.X.3.1.4 ,SPECIAL C2 HEADQUARTERS COMPONENT,POINT,
  465,D,Friend,SFGPUH---------,S F G P UH -- -- -- -- -,1.X.3.1.5 ,UNIT GENERAL HEADQUARTERS,POINT,
  466,D,Friend,SFGPUH---------,S F G P UH -- -- -- -- -,1.X.3.1.6 ,GENERAL HEADQUARTERS AND SERVICE,POINT,
  467,D,Friend,SFGPUHGL-------,S F G P UH GL -- -- -- -,1.X.3.1.7 ,UNIT GENERAL LIAISON,POINT,
  468,D,Friend,SFGPE----------,S F G P E- -- -- -- -- -,1.X.3.2 ,GROUND TRACK EQUIPMENT,POINT,
  469,D,Friend,SFGPEW---------,S F G P EW -- -- -- -- -,1.X.3.2.1 ,WEAPONS,POINT,
  470,D,Friend,SFGPEWM--------,S F G P EW M- -- -- -- -,1.X.3.2.1.1 ,MISSILE LAUNCHERS,POINT,
  471,D,Friend,SFGPEWMA-------,S F G P EW MA -- -- -- -,1.X.3.2.1.1.1 ,AIR DEFENCE (AD) MISSILE LAUNCH,POINT,
  472,D,Friend,SFGPEWMAS------,S F G P EW MA S- -- -- -,1.X.3.2.1.1.1.1 ,SHORT RANGE AD MISSILE LAUNCHERS,POINT,
  
negative.code: 557,D,Friend,SFGPEVEM-------,S F G P EV EM -- -- -- -,1.X.3.2.2.3.4 ,MINE LAYING VEHICLE,POINT,
  558,D,Friend,SFGPEVEMA------,S F G P EV EM A- -- -- -,1.X.3.2.2.3.4.1 ,ARMOURED VEHICLE MOUNTED,POINT,
  559,D,Friend,SFGPEVEMT------,S F G P EV EM T- -- -- -,1.X.3.2.2.3.4.2 ,TRAILER MOUNTED,POINT,
  560,D,Friend,SFGPEVEMV------,S F G P EV EM V- -- -- -,1.X.3.2.2.3.4.3 ,ARMOURED CARRIER WITH VOLCANO,NO_SYMBOL,
  561,D,Friend,SFGPEVEMSM-----,S F G P EV EM SM -- -- -,1.X.3.2.2.3.4.5 ,ARMOURED CARRIER WITH SCATTERABLE MINES,POINT,
  562,D,Friend,SFGPEVED-------,S F G P EV ED -- -- -- -,1.X.3.2.2.3.5 ,DOZER,POINT,
  563,D,Friend,SFGPEVD--------,S F G P EV D- -- -- -- -,1.X.3.2.2.3.6 ,DRILLING VEHICLE,POINT,
  