Hi,everyone.

I have a question about fleet supply. Supposing there are 4 Command Counters in Fleet Supply area,and I have a system with 2 cruisers and 2 destroyers there. Can I produce a new dreadnought and immediately destroy 1 destroyer to meet the fleet limit?

Same question. Can I move a dreadnought into a system containing 4 cruisers(4 CC in Fleet Supply area),and immediately destroy 1 cruiser to meet the fleet limit?

Thanks!

No, you may not. From rules, p. 21 :

A player may never move units,
build units, or otherwise acquire units in
any system so that the number of ships herein (again,
excluding Fighters) exceed the number of Command
Counters in his Fleet Supply area. If, for any reason,
the number of ships in a system should exceed the
number of Command Counters in a player's Fleet
Supply, the owner of those ships must immediately
remove enough ships from the system (by placing
them back with his reinforcements) until the
number of ships is again in compliance with the
number of Command Counters in his Fleet
Supply area.

The second sentence is for cases where e.g. due to an agenda your fleet supply comes down.

Now I understand that. Thank you!