--- In [email protected], Bruce Napier <[EMAIL PROTECTED]> wrote:
> it's called shared diesel calculator
Thanks for this Bruce.
I am just checking your assumptions, so that I understand what using
it would say, to HMRC, are the assumptions I accept. 

You seem to be saying:
Assuming I need to generally run my engine (as a generator) for
charging my batteries for 4 hours (in my case), when cruising for 4
hours or less, 50% of my usage is for propulsion, 50% is for domestic.
Anything over 4 hours, 100% is for propulsion.
Is that your assumption?

I wonder if engine hours in locks could also be considered as 100%
non-propulsion? Thus if I record how many locks I cruise in a day, and
divide by 3 (since a lock is generally considered to take the same
time as a mile) I can subtract that (number of hours)/2 from the
propulsion total.

Can you point us to the HMRC, or any other, website that explains what
is going to be allowable under each heading?

WBW

John

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