On 2 Apr 2018, at 01:31, Jeff Zeitlin <xxxxxx@freelancetraveller.com> wrote:
>
> Technically, I believe the rules don't actually admit any allowance for
> overage; a design that can't be brought below 101 tons must be treated as a
> 200-ton design. However, dating back to the LBB days, there's been a _de
> facto_ allowance; at the moment, I don't recall whether that allowance was
> 10% or 20%. Can someone enlighten me, please?

Others have made the point about the deckplan allowance.

I’ll just note that ship sizes, per High Guard (2nd ed, p22, para 2):

“tonnage code A includes all tonnages from 1,000 to 1,999 tons.

Phil Kitching