Navy supply fleet

Why did my navy supply unit desapeared?
There are no logs about that.... my purchases for ammmo are automatic, so it couldnt be the reason of ammo shortage... My economy is is making profits, I have enough soldiers, I have navy base...

Some times the icons are placed one on top of the other so it appears your missing one. Check military unit's and see if the right number of supply units are there

I have only one military unit.... large supply unit (land) and my navy supply unit dessapeared just as air force defence wing.... but land supply unit still stands....