On Jun 27, 2:15*am, Herodotus wrote:
... Also, in many ports it is
necessary to use jerry cans to ferry the diesel between the pump and
the boat. ...

That's been our experience. Many boats, particularly North American
boats, put a plank between some stanchions and tie their extra fuel
and water to it. It was so common for a while on the coconut milk run
that I had a Kiwi tell me that for years he was convinced that
American designers didn't put fuel tanks in their boats. The
advantages are that you carry extra fuel on an extended passage
through places where fuel may be unavailable or expensive or of poor
quality. And, you get the weight out on the rail for a passage that is
essentially all on one tack. Some of the disadvantages are that the
cans sit in the sun and may get contaminated by salt water and are
exposed to wave impacts that can result in loss of fuel, damage to the
stanchions or loose cans on the deck.

We keep our cans in a sail locker. We started with one 20 liter can
and one 10, but over the years have acquired enough cans so we can
fill the main tanks in one run (if you've got to borrow a truck to go
to find fuel it's nice to do it all in one go). And, it is hard to
resist the temptation to use them as extra tankage now that we have
them...

-- Tom.