mk1 


     Caliber = 20.3 cm (8.0 inch) 
     Shell weight = 120 kg (264 lbs) 
     Muzzle velocity = 860 m/s (2820 fps) 

     Relative ballistic performance: 1.00 

     Muzzle energy = 44.352 megajoules = 16343.7 foot-tons 

     Relative muzzle energy: 1.00 

     Barrel length: 50 calibers 


     Elevation          Range         Time      Velocity   Fall Angle 

       2.5 deg        5400 meters     7.3 sec    645 m/s     3.1 deg 
       5.0 deg        9200 meters    13.9 sec    530 m/s     6.9 deg 
       7.5 deg       12200 meters    20.0 sec    460 m/s    11.3 deg 
      10.0 deg       14600 meters    25.8 sec    415 m/s    16.1 deg 
      12.5 deg       16700 meters    31.2 sec    386 m/s    20.9 deg 
      15.0 deg       18400 meters    36.4 sec    367 m/s    25.7 deg 
      20.0 deg       21400 meters    46.2 sec    350 m/s    34.6 deg 
      25.0 deg       23800 meters    55.5 sec    348 m/s    42.4 deg 
      30.0 deg       25700 meters    64.3 sec    354 m/s    48.8 deg 
      35.0 deg       27100 meters    72.6 sec    364 m/s    53.9 deg 
      40.0 deg       28100 meters    80.6 sec    377 m/s    58.3 deg 
      45.0 deg       28500 meters    88.2 sec    390 m/s    62.1 deg 
      50.0 deg       28300 meters    95.3 sec    402 m/s    65.4 deg 


          Armor Penetration - Vertical Belt Armor 

               (Relative armor quality, 1.00) 

               Maximum penetration: 41.39 cm 


     Elevation          Range            Belt       Deck 

       2.0 deg        4500 meters        30 cm
       3.5 deg        7100 meters        25 cm
       5.5 deg        9900 meters         ...        2 cm 
       5.8 deg       10300 meters        20 cm
       9.8 deg       14400 meters        15 cm
      13.4 deg       17300 meters         ...        4 cm 
      18.8 deg       20800 meters        10 cm
      20.5 deg       21600 meters         ...        6 cm 
      27.6 deg       24800 meters         ...        8 cm 
      35.4 deg       27200 meters         ...       10 cm 
      44.0 deg       28400 meters         ...       12 cm 
      47.1 deg       28500 meters         5 cm


     Maximum range = 28500 meters at 45.8 deg elevation