Well - it depends on what you're prepared to put up with. You would certainly be able to get sufficient not to keel over altogether just by eating whatever starch (potatoes/rice/pasta/bread) was available in its plain version, with salad or fruit. Plus biscuits & crisps & whatnot are available from the captain's stores.
If I were doing it again I'd take more of my own provisions as backup (on the 2nd voyage I took a tub of vegan cream cheese & had half a jar of Vegemite left, so could have cream cheese & Marmite on bread). You can usually *export* fruit/veg, but you may have to make sure you get rid of it before you get to the next country.
Cheese is also a normal sort of thing to have available.
Basically: I survived OK for 24 days, and I reckon that trip was about the worst situation you'd be in in terms of "eat what you can & hope for the best". So I wouldn't be put off by that. People are generally very helpful & will assist :)
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If I were doing it again I'd take more of my own provisions as backup (on the 2nd voyage I took a tub of vegan cream cheese & had half a jar of Vegemite left, so could have cream cheese & Marmite on bread). You can usually *export* fruit/veg, but you may have to make sure you get rid of it before you get to the next country.
Cheese is also a normal sort of thing to have available.
Basically: I survived OK for 24 days, and I reckon that trip was about the worst situation you'd be in in terms of "eat what you can & hope for the best". So I wouldn't be put off by that. People are generally very helpful & will assist :)