[Alneyan]

A ship hiding in a storm (crafty Gandalf) replenishes its supplies as anywhere else within the system. It does not work for nebulaes and other special systems however.

You cannot fleet satellites with vessels, or any other unit except fighters. But fleeting fighters with ships will not cause them to share their supplies, so do not put fighters along with a ship with nearly no supplies to make them share their common pool. Bases may be fleeted with ships if you switch the appropriate option on in settings.txt

A spaceyard vessel or base can launch units on its own, so long as you have the space to put cargo and/or launch components on board the ship (a spaceyard base could have a Spaceyard, the needed components, one Minelayer and one Cargo bay for example).