10 SU each.
Support is a
new concept to Cataclysm. Each ship requires a certain
number of Support Units (SU) to operate and stay in working
order. The sum of the Support Requirements for all of your
ships in the field or under construction must not exceed
your fleet's maximum support capacity.
modules can be added to a Command Ship or Carrier to
increase its support capacity. A command ship has space for
12 support modules; a carrier has space for 6. Each support
module adds 10 SU's to the fleet total.