@Faramir said in Transport vs Sub:
Can a transport make an amphibious assault where there is an enemy submarine if an air unit escorts the transport?
No, as an air unit is not a “warship belonging to the attacking power”.
Rulebook, page 13:
“However, a transport is not allowed to offload land units for an amphibious assault in a sea zone containing one or more ignored enemy submarines unless at least one warship belonging to the attacking power is also present in the sea zone at the end of the Combat Move phase.”