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backstaff
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English
Wikipedia
has an article on:
backstaff
Wikipedia
backstaff
(
plural
backstaffs
or
backstaves
)
(
nautical
)
An early
navigational
instrument
for
measuring
the
altitude
of the
sun
and hence
calculating
latitude
.
Categories
:
English lemmas
English nouns
English countable nouns
English nouns with irregular plurals
en:Nautical