ORIGINAL: treespider
My guess is you have heavy equipment loaded into troop space on the AP. Due to the Heavy Equipment ->Troop Space Offset which multiplies loadcost the Heavy Equipment now has a Loadcost far in excess of the Port capacity. Try loading the Equipment onto an AK or xAK using Cargo space instead of Troop space...
I'll get you a manual ref in a sec...
Heavy Equipment (loadcost greater than 9) actually is multiplied by 3 when loaded ... So a 9 point item uses 27 points of space - (p111 and 112)
Medium Equipment (LC 5-8) is multiplied by 2...5 points actually uses 10.
However, The Cargo in Troop Space offset for an AP is 3 (chart on p120) which means you now multiply the modified Loadcost by 3.
The 2pdr AT gun is a 5 which is actaully 10 which becomes 30 in Troop Space.
The 18 Pounder is a 10 which is actually 30 which becomes 90 in Troop Space.
A Size 2 port can only unload 300 points of Cargo a turn from an AP in an Amphib TF when it is docked (p128)
However when it is not docked the rate is slower depending on port size...(p128)...