A system to secure a storage unit on a supply vessel surface includes a first frame module having a first attachment mechanism configured to releasably engage with a second attachment mechanism of a second frame module, and a first valve disposed on the first frame module, wherein the first valve is in fluid communication with a second valve disposed on the second frame module through a central flow pipe. The system further includes a locking mechanism configured to releasably secure the storage unit to at least the first frame module, and at least one flow conduit configured to provide fluid communication between the first valve and the storage unit.