                                Command : Sub

 The sub command is used to control a sub's depth and report critical informa-
tion  about  the  state  of  the  ship.   In its simplest form, sub shows ship
status:
   [##:##] Command: sub 3

   sub#       type          x,y   flt  eff depth mil food gun she pet mob   air
      3 submarine           0,2        37% surf    2   18   2   7   7  72  3000
   1 sub

    sub#  each sub's id number
    type  the type of sub; submarine, nuclear sub, etc
     x,y  the sub current location (relative to your capital)
     flt  the fleet designation letter (set by fleetadd command)
     eff  the sub's efficiency
   depth  the sub's current depth (surface, periscope, or deep)
     mil  the number of military on board
    food  the amount of food on board
     gun  the number of guns aboard
     she  the number of shells aboard (2 shells make 1 torpedo)

                                Command : Sub

     pet  the amount of petrol aboard
     mob  the amount of available mobility
     air  the amount of oxygen aboard

By adding a depth specifier, you can control the sub's  depth  in  the  water.
Each change in depth costs 1 unit mobility.  Valid depths are "surface", "per-
iscope", and "deep". For example,
   [##:##] Command: sub * p

   submarine #3 submerging to periscope depth in 0,2.
   submarine #17 submerging to periscope depth in 20,-12.
   submarine #18 submerging to periscope depth in 21,-11.
   3 subs

Submarines running on the surface are no different from any other ship.   They
can fire guns and torpedos, perform lookouts and radar, be seen by coastwatch,
etc.  A sub must be surfaced in order to move into a harbor or trade center.

                                Command : Sub

Subs running at periscope depth are somewhat more limited in  their  capabili-
ties.  For example, they can fire torpedos, but cannot fire guns, have limited
radar, and will not be  spotted  by  coastwatch.   They  cannot  board  or  be
boarded,  tend  or be tended, load or be unloaded.  A foreign 'look' will only
report the sighting of an unidentified periscope in the  water.   Sonar,  how-
ever, will identify the sub and its owner.

Subs running deep have the same limitations as those at periscope depth,  plus
some  new  ones.  They can fire torpedos, for example, but they have very poor
aim.  They cannot do a lookout, but do have limited radar capability.  Foreign
sonar will not identify the sub's owner, and neither can the sub's sonar posi-
tively identify anybody else. Deep subs also have the advantage of being  able
to navigate through mined waters (they move below the mines).

Submerged submarines gain efficiency at 1/4 the rate they would gain in a har-
bor.   On the surface, they gain efficiency at the same rate as any other ship
(1/3 the harbor rate).

                                Command : Sub

Sub-hunting aircraft on bombing missions have a 10% chance of not  being  able
to  locate  subs  at  periscope  depth.  If they are lucky enough to spot one,
bombing accuracy is somewhat reduced, making the  submerged  sub  a  difficult
target.   Deep subs are an even more difficult target; bombers have only a 45%
chance of spotting them, and bomb accuracy is even more severely reduced.

In the retaliatory action following a torpedo attack, a sub at periscope depth
has  only  a 5% chance of avoiding depth charges; a sub running deep has a 50%
chance.

See also : coastwatch, fire, load, lookout,  mine,  navigate,  tend,  torpedo,
show

