Not sure why powdered foods are worthwhile if you have to add heavy water
to make them? 5 litres per person per day is reasonable.
OK, good for back-up with a long, long life but two weeks (planned trip) starting with fresh foods, fresh meat, fresh veg isn't too bad and moving to canned after a few days is reasonable on health
and variety. After three days stew the lot, what's boiled will last another couple of days. That's the first week covered, then it's survival by inventive cooking
and spices weigh very little and give variety and surprises. Add calories by chocolate, great, and it never goes off bad enough not to eat.
Your body lasts a month without food
, a week without water.
it carefully, disconnect the electric pump
when long cruising and hand pump for economical use.
Make salt water
easy to access for preparing and rinsing veg, washing
and rinsing plates etc. The debate seems open on clothes washing
in sea water.