Some quite good assumptions and really highlights problem areas.
I see one is not included in your list but 350kg for a generator
shows what a big performance hit this would be.
I would say 960kg for water
given there is a water
maker in the mix would be unnecessary.
Suppliers and personal is too small IMO a person needs to consume about 2.5kg per day per person. You also have to account for extra days and it is not just what you eat it you need to the natural packaging, banana skins, potato peelings etc and the unnatural, cans, bottles and cartons.
Soap, toothpaste, shampoo, sheets
, bedding, weather
and tools seem to have been missed. This makes up a huge percentage of the weight on a cruising boat
. Rigorous selection can help like only taking the sockets that you need rather than the whole socket set. Engine
spares can be limited on a cat for A-B cruises but need to be included for long term living aboard
Is this something you are planning?
The thought of "14" crew offshore
in the official assumptions is enough to make anyone give up sailing.