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I sent some of the messages relating to this topic to Corradino
Savona, Italy, and he sent this first reply. I asked his permission to
on MapHist, and he added the 2nd reply and said posting it was fine.
Begin forwarded message:
Date: December 28, 2011 3:07 AM
To: Ed Dahl <ed.d...@sympatico.ca>
Subject: RE: Odd Numbers on an Old Wind Rose
I agree with Joaquim Alves Gaspar and Wolfgang Köberer. It is an
the "Regimiento", but the figures have been rounded so it is
impossible to say
if it is the original (Evora and Munich) or the one corrected by Pedro
Everything is clearly explained in the book by Joaquim Bensaude,
nautique au Portugal a l'époque des grandes decouvertes, Berne 1912/17,
reprinted by N. Israel in 1967.
On Dec 28, 2011, at 10:50 AM, Corradino Astengo wrote:
I agree also with Vladimiro Valerio: the system of the "Regimento" is
as the "toleta", but it is in a way more refined, because you don't
calculate the miles (or leagues) sailed, which is always very
order to know your position. It is sufficient to follow a rhumb and to
calculate your latitude. You might also keep track of the miles sailed
to compare the two different observations, but it is suggested, in
case they are
different, to use the one calculated with the latitude. The
"Regimento" is also a
system to calculate the longitude.
Fernando Colombo at the Junta de Badajoz gave in 1424 a "parecer" in
stated that to resolve the problem of Moluccas it was necessary to
their longitude and he suggested five different methods to do it, the
them is this one, even if he admits that it is unsafe "por la
hay de caminar el navio por reta linea".
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