ysi_maniac -- here it is.
In work ruff picture attached.
Need to make door outline below rear side window as on truck. Window frame placed (not glued) for photo.
Is room for crew to move around turret and bridge/storage structure.
First raised piece behind bow will be hatch.
Going with multipurpose rear deck to have mission specific items attached at shore. Examples from 1/72 kits are Bofors 40mm trailered ground type mount which could be bolted down or trainable Katyush rocket launcher or Hellfire launcher, 20mm Vulcan(s), etc.....
Rear storage part of superstructure can store mission specific stuff like ammo or rockets. Rear deck and superstructure can carry food, fresh water, fuel barrels, ammo boxes, general supplies for cargo missions too.
Hope to build various mission specific loads for rear deck. Will take some time.
Thatz build concept that soon became apparent to me.
Be versatile vessel around the archipelago.