I bought a pelicase 1660. It’s really confortable for the ROV, spare equipment, tools and laptop. It may contains everything you need for on board mission, excluding the umbilical.
first floor: tools, battery charger, secondary battery, skid,
second floor: spare can containing optional foam, box with spare parts.
third floor: ROV, Laptop, Logbook, bench cables, controller and spare parts.
closed plus umbilical.