LANDING
                    ------
  Up to three options are available when you
land on a planet: general information, trading,
and the shipyard.  General information can
always be obtained by clicking on the button
at the top of the screen with the planet's name
on it.  If a market or shipyard is present
the appropriate button will be available.
(If you are flying a ship with no cargo
capacity the market button will never appear.
If you are carrying cargo you must sell it to
be able to buy a new ship.)

  The general information display provides you
with a few lines of text about the planet
you're on, and there may also be the option to
visit someone from there.

                   TRADING
                   -------
  When you select to trade a list of the
available goods and their prices will be drawn
down the left side of the screen, and a list
of the goods in your ship's hold will be drawn
down the right side.  Click on a slot in the
ship's hold (right side) to select it, and
then click on a cargo item (left side) to try
to buy that item and place it in the hold.  If
there is already an item in the hold it will
be sold automatically. 
                  
                 THE SHIPYARD
                 ------------
  The left side of the shipyard display shows
ships for sale.  the prices indicate the change
in your bank balance when you buy the ship, so
that if the listed price is negative, it means
that your current ship is worth more than the
new one.  If your ship is damaged the price of
a new ship will be raised to cover the cost of
repairs.  If your ship is one of the types on
the list, it will be displayed in black.  If
your ship is damaged there will be a charge
for 'buying' your own ship, which covers the
cost of repairs.

  The right side of the shipyard display shows
upgrade options.  You can upgrade the speed
of your guns, the quality of your heat sinks
(slowing the rate of heat buildup due to
 thrusting or shooting) and the output of your
generator.  When you buy a new ship the
upgrades are removed from your existing craft
and transferred to the new one.