The issue with water gaps is that old style pre-ISO container (AKA "BOX") break bulk freighters unloaded at a rate of 20-30 tons per hour per hatch.
Loading was a fraction of that pace as the empty space of a break bulk freighter had to be braced with (usually wooden) structure, cushioning and dunnage for whatever load was being placed into it.
A 10,000 ton freighter would have five hatches and that was the largest economical for government freighters of WW2.
See:
S.S. Lane Victory Virtual Tour
Welcome to the Main Deck and Cargo Handling Gear!
http://www.lanevictory.org/laneVtour_mast_boom.php
The ship also has a pair of jumbo booms that was used for loading heavier cargo. There is a 50 ton boom mounted on the aft of the main-mast to service cargo hatch #3. There is a 30 ton boom mounted forward of the mizzen mast to service cargo hatch #4. The jumbo booms require four winches to operate both up/down and left/right movements. These booms are currently installed on the S.S. Lane Victory but not certified for use as the Coast Guard generally considers shoreside or floating cranes safer for loading/unloading heavy cargoes.
Commercial freighters of the time were 50% to 60% the size of S.S. Lane Victory and ran to four hatches because of the costs of the freighter sitting in port idle while loading operations were happening.
Wartime governments could through huge numbers of people at government freighters in a way commercial operators could not.
It took the Vietnam War to kick off the "Container Revolution" we live with today.
The Sharonan's have a huge incentive for multi-modal containers, especially with the 6K mile Pacific water gap in their supply line.
They have not been shown any containerized shipping infrastructure, despite much of their transportation system being center stage, so I assume they don't have ISO style containers.
I have not seen enough of the Arcanians to make a call on their logistics.
Their slider-ways, magic levitation loaded ships, magic stand-alone personal computers and Dragon and horse pulled pod transports suggest they may be closer to such a containerized shipping package system.