From: Winnipeg, MB
After some digging I came up with this from Dan Bowen: "Port, Naval Support, ops, but mostly the TF type and ships in the TF. Amphib ships with landing craft can help other ships unload, for instance" in talking about what will help unload. Also, that the LCTs I was curious about must be in the TF to work. Unfortunately, you can not create them at a site and add them to an Amph TF. They WILL transfer to a Transport (but not Cargo) TF.
I have created LCTs from non-transport TF supply. It just has to be loaded in the right locations and over 10,000 available. The text "Create Landing Craft" will turn yellow when you are good to go. Creating them from TF supply simulates a deck loaded with LCT. TF supply is debited something like 80 supply points per LCT.
No matter how bad a situation is, you can always make it worse. - Chris Hadfield : An Astronaut's Guide To Life On Earth